Sinkhole (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Sinkhole" in English language version.

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15doi.org

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8harvard.edu

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archive.org

Friend, Sandra (2002). Sinkholes. Pineapple Press Inc. p. 11. ISBN 978-1-56164-258-8. Retrieved 7 June 2010.
Kambesis, P.; Brucker, R.; Waltham, T.; Bell, F.; Culshaw, M. (2005). "Collapse sinkhole at Dishman Lane, Kentucky". Sinkholes and Subsidence: Karst and Cavernous Rocks in Engineering and Construction. Berlin: Springer. p. 281. doi:10.1007/b138363. ISBN 3-540-20725-2.
Halls, Monty; Krestovnikoff, Miranda (2006). Scuba diving (1st American ed.). New York: DK Pub. p. 267. ISBN 9780756619497.

archives-ouvertes.fr

hal-insu.archives-ouvertes.fr

Vincent, Jean-Baptiste; et al. (2 July 2015). "Large heterogeneities in comet 67P as revealed by active pits from sinkhole collapse" (PDF). Nature. 523 (7558): 63–66. Bibcode:2015Natur.523...63V. doi:10.1038/nature14564. PMID 26135448. S2CID 2993705.

bgs.ac.uk

"Caves and karst – dolines and sinkholes". British Geological Survey.
"Quarrying and the environment". bgs. Retrieved 3 June 2018.

birminghammail.co.uk

"The cricket club that went down the hole". 16 October 2017.

books.google.com

Williams, Paul (2004). "Dolines". In Gunn, John (ed.). Encyclopedia of Caves and Karst Science. Taylor & Francis. pp. 628–642. ISBN 978-1-57958-399-6.

ca.gov

dot.ca.gov

William L. Wilson; K. Michael Garman. "IDENTIFICATION AND DELINEATION OF SINKHOLE COLLAPSE HAZARDS IN FLORIDA USING GROUND PENETRATING RADAR AND ELECTRICAL RESISTIVITY IMAGING" (PDF). Subsurface Evaluations, Inc. Case 3 – Mariner Boulevard.

caves.org

Halliday, W.R. (2007). "Pseudokarst in the 21st Century" (PDF). Journal of Cave and Karst Studies. 69 (1): 103–113. Retrieved 24 March 2013.

chron.com

Horswell, Cindy (5 January 2009). "Daisetta sinkhole still a mystery 8 months after it formed". Houston Chronicle. Retrieved 29 June 2013.

cnc3.co.tt

"What is a sinkhole?". CNC3. 14 March 2016. Retrieved 31 March 2016.

cnn.com

Katie Hunt (14 March 2022). "Holes the size of city blocks are forming in the Arctic seafloor". CNN. Retrieved 15 March 2022.

doi.org

Monroe, Watson Hiner (1970). "A glossary of Karst terminology". U.S. Geological Survey Water Supply Paper. 1899-K. doi:10.3133/wsp1899k.
Palmer, Arthur N. (1 January 1991). "Origin and morphology of limestone caves". Geological Society of America Bulletin. 103 (1): 1–21. Bibcode:1991GSAB..103....1P. doi:10.1130/0016-7606(1991)103<0001:oamolc>2.3.co;2. ISSN 0016-7606.
Vincent, Jean-Baptiste; et al. (2 July 2015). "Large heterogeneities in comet 67P as revealed by active pits from sinkhole collapse" (PDF). Nature. 523 (7558): 63–66. Bibcode:2015Natur.523...63V. doi:10.1038/nature14564. PMID 26135448. S2CID 2993705.
Benson, Richard C.; Yuhr, Lynn B. (2015). Site Characterization in Karst and Pseudokarst Terraines: Practical Strategies and Technology for Practicing Engineers, Hydrologists and Geologists. Dordrecht: Springer. doi:10.1007/978-94-017-9924-9. ISBN 978-94-017-9923-2. S2CID 132318001.
Newton, John G. (1987). "Development of sinkholes resulting from man's activities in the eastern United States" (PDF). Circular. U.S. Geological Survey Circular 968. U.S. Government Print Office. doi:10.3133/cir968. hdl:2027/uc1.31210020732440.
Kambesis, P.; Brucker, R.; Waltham, T.; Bell, F.; Culshaw, M. (2005). "Collapse sinkhole at Dishman Lane, Kentucky". Sinkholes and Subsidence: Karst and Cavernous Rocks in Engineering and Construction. Berlin: Springer. p. 281. doi:10.1007/b138363. ISBN 3-540-20725-2.
Sowers, George F. (1996). Building on sinkholes. New York: American Society of Civil Engineers. doi:10.1061/9780784401767. ISBN 0-7844-0176-4.
Weary, David J. (2015). Doctor, Daniel; Land, Lewis; Stephenson, J (eds.). The cost of karst subsidence and sinkhole collapse in the United States compared with other natural hazards. University of South Florida. doi:10.5038/9780991000951. ISBN 978-0-9910009-5-1. Retrieved 30 May 2019. {{cite book}}: |website= ignored (help)
Kuniansky, E.L.; Weary, D.J.; Kaufmann, J.E. (2016). "The current status of mapping karst areas and availability of public sinkhole-risk resources in karst terrains of the United States" (PDF). Hydrogeology Journal. 24 (3). Springer Berlin Heidelberg: 614. Bibcode:2016HydJ...24..613K. doi:10.1007/s10040-015-1333-3. S2CID 130375566. Retrieved 5 May 2019.
Parise, M.; Gunn, J. (2007). "Natural and anthropogenic hazards in karst areas: an introduction". Geological Society, London, Special Publications. 279 (1): 1–3. Bibcode:2007GSLSP.279....1P. doi:10.1144/SP279.1. S2CID 130950517.
Bonacci, O.; Ljubenkov, I.; Roje-Bonacci, T. (31 March 2006). "Karst flash floods: an example from the Dinaric karst (Croatia)". Natural Hazards and Earth System Sciences. 6 (2): 195–203. Bibcode:2006NHESS...6..195B. doi:10.5194/nhess-6-195-2006.
Tolmachev, Vladimir; Leonenko, Mikhail (2011). "Experience in Collapse Risk Assessment of Building on Covered Karst Landscapes in Russia". Karst Management. pp. 75–102. doi:10.1007/978-94-007-1207-2_4. ISBN 978-94-007-1206-5.
Paull, Charles K.; Dallimore, Scott R.; Jin, Young Keun; Caress, David W.; Lundsten, Eve; Gwiazda, Roberto; Anderson, Krystle; Hughes Clarke, John; Youngblut, Scott; Melling, Humfrey (22 March 2022). "Rapid seafloor changes associated with the degradation of Arctic submarine permafrost". Proceedings of the National Academy of Sciences. 119 (12): e2119105119. Bibcode:2022PNAS..11919105P. doi:10.1073/pnas.2119105119. PMC 8944826. PMID 35286188.
Waltham, T. (2008). "Sinkhole hazard case histories in karst terrains". Quarterly Journal of Engineering Geology and Hydrogeology. 41 (3): 291–300. Bibcode:2008QJEGH..41..291W. doi:10.1144/1470-9236/07-211. S2CID 128585380.
Rajendran, Sankaran; Nasir, Sobhi (2014). "ASTER mapping of limestone formations and study of caves, springs and depressions in parts of Sultanate of Oman". Environmental Earth Sciences. 71 (1): 133–146, figure 9d (page 142), page 144. Bibcode:2014EES....71..133R. doi:10.1007/s12665-013-2419-7. S2CID 128443371.

enciklopedija.hr

"dolina". Hrvatska enciklopedija. Retrieved 11 October 2024.
"ponikva". Hrvatska enciklopedija. Retrieved 11 October 2024.

excite.com

apnews.excite.com

Ritter, Malcolm (1 July 2015). "It's the pits: Comet appears to have sinkholes, study says". AP News. Retrieved 2 July 2015.

floridastateparks.org

"Devils Millhopper Geological State Park". Floridastateparks.org. Archived from the original on 2 January 2015. Retrieved 3 May 2014.

floridatoday.com

Vazquez, Tyler (29 September 2017). "The Hole Truth". Florida Today. Melbourne, Florida. pp. 1A, 2A. Retrieved 29 September 2017.

google.ie

"52°07'57.5"N 9°44'45.4"W · Kilderry South, Co. Kerry, Ireland". 52°07'57.5"N 9°44'45.4"W · Kilderry South, Co. Kerry, Ireland.

gyproc.ie

"Subsidence Incident | Gyproc".

handle.net

hdl.handle.net

Newton, John G. (1987). "Development of sinkholes resulting from man's activities in the eastern United States" (PDF). Circular. U.S. Geological Survey Circular 968. U.S. Government Print Office. doi:10.3133/cir968. hdl:2027/uc1.31210020732440.
Beaumont, P.B.; Vogel, J.C. (May–June 2006). "On a timescale for the past million years of human history in central South Africa". South African Journal of Science. 102: 217–228. hdl:10204/1944. ISSN 0038-2353.

harvard.edu

ui.adsabs.harvard.edu

Palmer, Arthur N. (1 January 1991). "Origin and morphology of limestone caves". Geological Society of America Bulletin. 103 (1): 1–21. Bibcode:1991GSAB..103....1P. doi:10.1130/0016-7606(1991)103<0001:oamolc>2.3.co;2. ISSN 0016-7606.
Vincent, Jean-Baptiste; et al. (2 July 2015). "Large heterogeneities in comet 67P as revealed by active pits from sinkhole collapse" (PDF). Nature. 523 (7558): 63–66. Bibcode:2015Natur.523...63V. doi:10.1038/nature14564. PMID 26135448. S2CID 2993705.
Kuniansky, E.L.; Weary, D.J.; Kaufmann, J.E. (2016). "The current status of mapping karst areas and availability of public sinkhole-risk resources in karst terrains of the United States" (PDF). Hydrogeology Journal. 24 (3). Springer Berlin Heidelberg: 614. Bibcode:2016HydJ...24..613K. doi:10.1007/s10040-015-1333-3. S2CID 130375566. Retrieved 5 May 2019.
Parise, M.; Gunn, J. (2007). "Natural and anthropogenic hazards in karst areas: an introduction". Geological Society, London, Special Publications. 279 (1): 1–3. Bibcode:2007GSLSP.279....1P. doi:10.1144/SP279.1. S2CID 130950517.
Bonacci, O.; Ljubenkov, I.; Roje-Bonacci, T. (31 March 2006). "Karst flash floods: an example from the Dinaric karst (Croatia)". Natural Hazards and Earth System Sciences. 6 (2): 195–203. Bibcode:2006NHESS...6..195B. doi:10.5194/nhess-6-195-2006.
Paull, Charles K.; Dallimore, Scott R.; Jin, Young Keun; Caress, David W.; Lundsten, Eve; Gwiazda, Roberto; Anderson, Krystle; Hughes Clarke, John; Youngblut, Scott; Melling, Humfrey (22 March 2022). "Rapid seafloor changes associated with the degradation of Arctic submarine permafrost". Proceedings of the National Academy of Sciences. 119 (12): e2119105119. Bibcode:2022PNAS..11919105P. doi:10.1073/pnas.2119105119. PMC 8944826. PMID 35286188.
Waltham, T. (2008). "Sinkhole hazard case histories in karst terrains". Quarterly Journal of Engineering Geology and Hydrogeology. 41 (3): 291–300. Bibcode:2008QJEGH..41..291W. doi:10.1144/1470-9236/07-211. S2CID 128585380.
Rajendran, Sankaran; Nasir, Sobhi (2014). "ASTER mapping of limestone formations and study of caves, springs and depressions in parts of Sultanate of Oman". Environmental Earth Sciences. 71 (1): 133–146, figure 9d (page 142), page 144. Bibcode:2014EES....71..133R. doi:10.1007/s12665-013-2419-7. S2CID 128443371.

hathitrust.org

babel.hathitrust.org

Mine Safety and Health Administration (13 August 1981). The Jefferson Island Mine inundation (Report). Retrieved 4 February 2020.

lun.com

Vidal, Luis; Jorge Nunez (2 June 2010). "¿Que diablos provoco este escalofriante hoyo?". Las Ultimas Noticias (in Spanish). Retrieved 20 March 2013.

muscatdaily.com

"Dhofar caves: A tourist's paradise". Muscat Daily. 11 January 2015. Archived from the original on 27 November 2016.

nationalgeographic.com

news.nationalgeographic.com

""Haunted" Maya Underwater Cave Holds Human Bones". 16 January 2014. Archived from the original on 19 January 2014. Retrieved 24 June 2019.
Than, Ker (1 June 2010). "Sinkhole in Guatemala: Giant Could Get Even Bigger". National Geographic. Archived from the original on 2 June 2010. Retrieved 20 March 2013.

news.google.com

"Nation's largest sinkhole may be near Montevallo" (29 March 1973) The Tuscaloosa News

nih.gov

pubmed.ncbi.nlm.nih.gov

Vincent, Jean-Baptiste; et al. (2 July 2015). "Large heterogeneities in comet 67P as revealed by active pits from sinkhole collapse" (PDF). Nature. 523 (7558): 63–66. Bibcode:2015Natur.523...63V. doi:10.1038/nature14564. PMID 26135448. S2CID 2993705.
Paull, Charles K.; Dallimore, Scott R.; Jin, Young Keun; Caress, David W.; Lundsten, Eve; Gwiazda, Roberto; Anderson, Krystle; Hughes Clarke, John; Youngblut, Scott; Melling, Humfrey (22 March 2022). "Rapid seafloor changes associated with the degradation of Arctic submarine permafrost". Proceedings of the National Academy of Sciences. 119 (12): e2119105119. Bibcode:2022PNAS..11919105P. doi:10.1073/pnas.2119105119. PMC 8944826. PMID 35286188.

ncbi.nlm.nih.gov

Paull, Charles K.; Dallimore, Scott R.; Jin, Young Keun; Caress, David W.; Lundsten, Eve; Gwiazda, Roberto; Anderson, Krystle; Hughes Clarke, John; Youngblut, Scott; Melling, Humfrey (22 March 2022). "Rapid seafloor changes associated with the degradation of Arctic submarine permafrost". Proceedings of the National Academy of Sciences. 119 (12): e2119105119. Bibcode:2022PNAS..11919105P. doi:10.1073/pnas.2119105119. PMC 8944826. PMID 35286188.

nps.gov

"Cathedral Valley – Capitol Reef National Park". National Park Service, US Dept of Interior. Retrieved 24 March 2013.

nytimes.com

Breining, Greg (5 October 2007). "Getting Down and Dirty in an Underground River in Puerto Rico". The New York Times. ISSN 0362-4331. Retrieved 31 March 2016.
Wines, Michael (25 September 2013). "Ground Gives Way, and a Louisiana Town Struggles to Find Its Footing". New York Times. Retrieved 26 September 2013.
Blumenthal, Ralph (9 May 2008). "Sinkhole and Town: Now You See It". The New York Times. Retrieved 29 June 2013.

orlandosentinel.com

Huber, Red (13 November 2012). "Looking back at Winter Park's famous sinkhole". Orlando Sentinel.

osi.ie

maps.osi.ie

"Shop.osi.ie Mapviewer". Archived from the original on 29 August 2012. Retrieved 9 March 2015.

researchgate.net

Rajendran, Sankaran; Nasir, Sobhi (2014). "ASTER mapping of limestone formations and study of caves, springs and depressions in parts of Sultanate of Oman". Environmental Earth Sciences. 71 (1): 133–146, figure 9d (page 142), page 144. Bibcode:2014EES....71..133R. doi:10.1007/s12665-013-2419-7. S2CID 128443371.

rte.ie

Hussey, Sinéad (17 April 2020). "Crown hole appears in Magheracloone, Co Monaghan". RTÉ News.

semanticscholar.org

api.semanticscholar.org

Vincent, Jean-Baptiste; et al. (2 July 2015). "Large heterogeneities in comet 67P as revealed by active pits from sinkhole collapse" (PDF). Nature. 523 (7558): 63–66. Bibcode:2015Natur.523...63V. doi:10.1038/nature14564. PMID 26135448. S2CID 2993705.
Benson, Richard C.; Yuhr, Lynn B. (2015). Site Characterization in Karst and Pseudokarst Terraines: Practical Strategies and Technology for Practicing Engineers, Hydrologists and Geologists. Dordrecht: Springer. doi:10.1007/978-94-017-9924-9. ISBN 978-94-017-9923-2. S2CID 132318001.
Kuniansky, E.L.; Weary, D.J.; Kaufmann, J.E. (2016). "The current status of mapping karst areas and availability of public sinkhole-risk resources in karst terrains of the United States" (PDF). Hydrogeology Journal. 24 (3). Springer Berlin Heidelberg: 614. Bibcode:2016HydJ...24..613K. doi:10.1007/s10040-015-1333-3. S2CID 130375566. Retrieved 5 May 2019.
Parise, M.; Gunn, J. (2007). "Natural and anthropogenic hazards in karst areas: an introduction". Geological Society, London, Special Publications. 279 (1): 1–3. Bibcode:2007GSLSP.279....1P. doi:10.1144/SP279.1. S2CID 130950517.
Waltham, T. (2008). "Sinkhole hazard case histories in karst terrains". Quarterly Journal of Engineering Geology and Hydrogeology. 41 (3): 291–300. Bibcode:2008QJEGH..41..291W. doi:10.1144/1470-9236/07-211. S2CID 128585380.
Rajendran, Sankaran; Nasir, Sobhi (2014). "ASTER mapping of limestone formations and study of caves, springs and depressions in parts of Sultanate of Oman". Environmental Earth Sciences. 71 (1): 133–146, figure 9d (page 142), page 144. Bibcode:2014EES....71..133R. doi:10.1007/s12665-013-2419-7. S2CID 128443371.

sohu.com

news.sohu.com

"陕西发现天坑群地质遗迹并发现少见植物和飞猫" [Tiankeng group of geological relics with rare plants and flying cats found in Shaanxi]. Sohu.com Inc. Archived from the original on 25 November 2016.

speleogenesis.info

Zhu, Xuewen; Chen, Weihai (2006). "Tiankengs in the karst of China" (PDF). Speleogenesis and Evolution of Karst Aquifers. 4: 1–18. ISSN 1814-294X. Archived from the original (PDF) on 13 March 2016. Retrieved 23 September 2010.
Vesper, D.J.; Loop, C.M.; White, W.B. (2001). "Contaminant transport in karst aquifers" (PDF). Theoretical and Applied Karstology. 13 (14): 101–111. Archived from the original (PDF) on 7 March 2021. Retrieved 22 December 2020.
Zhu, Xuewen; Waltham, Tony (2006). "Tiankeng: definition and description" (PDF). Speleogenesis and Evolution of Karst Aquifers. 4 (1): 1–8, Fig. 4. Structural interpretation of Xiaozhai Tiankeng, page 4. Archived from the original (PDF) on 7 February 2017. Retrieved 28 November 2016.

springer.com

link.springer.com

Kuniansky, E.L.; Weary, D.J.; Kaufmann, J.E. (2016). "The current status of mapping karst areas and availability of public sinkhole-risk resources in karst terrains of the United States" (PDF). Hydrogeology Journal. 24 (3). Springer Berlin Heidelberg: 614. Bibcode:2016HydJ...24..613K. doi:10.1007/s10040-015-1333-3. S2CID 130375566. Retrieved 5 May 2019.

stripes.com

Schonauer, Scott (21 July 2007). "Missing American divers will be laid to rest after 30 years". Stars and Stripes. Archived from the original on 4 October 2013. Retrieved 28 April 2013.

thehill.com

Guzman, Joseph (10 June 2021). "A sinkhole larger than a football field has appeared in Mexico — and it's still growing". TheHill. Retrieved 11 June 2021.

time.com

newsfeed.time.com

Fletcher, Dan (1 June 2010). "Massive Sinkhole Opens in Guatemala". Time. Retrieved 20 March 2013.

tn.gov

Kohl, Martin (2001). "Subsidence and sinkholes in East Tennessee. A field guide to holes in the ground" (PDF). State of Tennessee. Archived from the original (PDF) on 14 July 2015. Retrieved 18 February 2014.

tnlandforms.us

Dunigan, Tom. "Grassy Cove". Tennessee Landforms. Retrieved 11 March 2014.

usgs.gov

pubs.usgs.gov

Newton, John G. (1987). "Development of sinkholes resulting from man's activities in the eastern United States" (PDF). Circular. U.S. Geological Survey Circular 968. U.S. Government Print Office. doi:10.3133/cir968. hdl:2027/uc1.31210020732440.
Doctor, Katarina. "GIS and Spatial Statistical Methods for Determining Sinkhole Potential in Frederick Valley, Maryland, page 100 in Kuniansky, E.L., 2008, U.S. Geological Survey Karst Interest Group Proceedings, Bowling Green, Kentucky, May 27–29, 2008: U.S. Geological Survey Scientific Investigations Report 2008-5023, 142 p." (PDF). U.S. Geological Survey. Retrieved 27 November 2018.

usgs.gov

"Sinkholes". Water Science School. U.S. Geological Survey. Retrieved 29 May 2019.

pubs.er.usgs.gov

Weary, David J. (2015). Doctor, Daniel; Land, Lewis; Stephenson, J (eds.). The cost of karst subsidence and sinkhole collapse in the United States compared with other natural hazards. University of South Florida. doi:10.5038/9780991000951. ISBN 978-0-9910009-5-1. Retrieved 30 May 2019. {{cite book}}: |website= ignored (help)

library.usgs.gov

"Possibly the nation's largest recent sinkhole – the 'December Giant' measuring 425 feet long, 350 feet wide and 150 feet deep – formed in central Alabama". USGS Denver Library Photographic Collection. U.S. Geological Survey. Retrieved 28 May 2019.

utah.gov

geology.utah.gov

"Sinkholes in Washington County". Utah gov Geological Survey. Archived from the original on 23 March 2011.

utexas.edu

geo.utexas.edu

"Sistema Zacatón". by Marcus Gary.

waikatoregion.govt.nz

"Subsidence". Waikato Regional Council. Retrieved 25 January 2018.

washingtonpost.com

"Researchers just discovered the world's deepest underwater sinkhole in the South China Sea". The Washington Post.

web.archive.org

Kohl, Martin (2001). "Subsidence and sinkholes in East Tennessee. A field guide to holes in the ground" (PDF). State of Tennessee. Archived from the original (PDF) on 14 July 2015. Retrieved 18 February 2014.
"Sinkholes in Washington County". Utah gov Geological Survey. Archived from the original on 23 March 2011.
Zhu, Xuewen; Chen, Weihai (2006). "Tiankengs in the karst of China" (PDF). Speleogenesis and Evolution of Karst Aquifers. 4: 1–18. ISSN 1814-294X. Archived from the original (PDF) on 13 March 2016. Retrieved 23 September 2010.
Vesper, D.J.; Loop, C.M.; White, W.B. (2001). "Contaminant transport in karst aquifers" (PDF). Theoretical and Applied Karstology. 13 (14): 101–111. Archived from the original (PDF) on 7 March 2021. Retrieved 22 December 2020.
""Haunted" Maya Underwater Cave Holds Human Bones". 16 January 2014. Archived from the original on 19 January 2014. Retrieved 24 June 2019.
Than, Ker (1 June 2010). "Sinkhole in Guatemala: Giant Could Get Even Bigger". National Geographic. Archived from the original on 2 June 2010. Retrieved 20 March 2013.
"China Exclusive: South China Sea "blue hole" declared world's deepest". New China. Xinhua. Archived from the original on 24 July 2016.
"陕西发现天坑群地质遗迹并发现少见植物和飞猫" [Tiankeng group of geological relics with rare plants and flying cats found in Shaanxi]. Sohu.com Inc. Archived from the original on 25 November 2016.
"时事新闻--解密汉中天坑群——改写地质历史的世界级"自然博物馆"" [Deciphering the Hanzhong tiankeng group – world-class "Nature Museum"]. Hanzhong People's Municipal Government. 25 November 2016. Archived from the original on 27 November 2016.
"Dhofar caves: A tourist's paradise". Muscat Daily. 11 January 2015. Archived from the original on 27 November 2016.
Zhu, Xuewen; Waltham, Tony (2006). "Tiankeng: definition and description" (PDF). Speleogenesis and Evolution of Karst Aquifers. 4 (1): 1–8, Fig. 4. Structural interpretation of Xiaozhai Tiankeng, page 4. Archived from the original (PDF) on 7 February 2017. Retrieved 28 November 2016.
Schonauer, Scott (21 July 2007). "Missing American divers will be laid to rest after 30 years". Stars and Stripes. Archived from the original on 4 October 2013. Retrieved 28 April 2013.
"Shop.osi.ie Mapviewer". Archived from the original on 29 August 2012. Retrieved 9 March 2015.
"Devils Millhopper Geological State Park". Floridastateparks.org. Archived from the original on 2 January 2015. Retrieved 3 May 2014.

wondermondo.com

"Largest and most impressive sinkholes of the world". Wondermondo. 19 August 2010.
"Naré sinkhole". Wondermondo. 5 August 2010.
"Sistema Zacatón". Wondermondo. 3 July 2010.
"Sinkholes". Wondermondo. 19 August 2010.
"Black Hole of Andros". Wondermondo. 17 August 2010.
"Bimmah sinkhole". Wondermondo. 3 February 2013.

worldcat.org

search.worldcat.org

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