Helen M. Duncan (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Helen M. Duncan" in English language version.

refsWebsite

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167^th place

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2books.google.com

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2geosociety.org

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1^st place

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archive.org

Kass-Simon, Gabriele (February 1993). Women of Science: Righting the Record. Indiana University Press. pp. 57–. ISBN 978-0-253-20813-2. Retrieved 3 April 2012.

books.google.com

Ogilvie, Marilyn Bailey; Harvey, Joy (2000-07-27). The Biographical Dictionary of Women in Science: Pioneering Lives from Ancient Times to the Mid-20th Century. Taylor & Francis US. pp. 384–. ISBN 978-0-415-92038-4. Retrieved 3 April 2012.
Geological Survey (U.S.) (1979). Geological Survey professional paper. Govt. Print. Off. p. DH3. Retrieved 3 April 2012.

geosociety.org

Inc., Advanced Solutions International. "Memorials". www.geosociety.org. Retrieved 2016-11-25. {{cite web}}: |last= has generic name (help)
Inc., Advanced Solutions International. "Memorials". www.geosociety.org. Retrieved 2016-11-25. {{cite web}}: |last= has generic name (help)

si.edu

siarchives.si.edu

"SIA RU007397, Duncan, Helen M. 1910–1971, Helen M. Duncan Papers, 1937–1966". Finding Aid for Helen M. Duncan Papers, 1937–1966. Smithsonian Institution Archives. 1937–1966. Retrieved 30 March 2012.

ucalgary.ca

archives.datapages.com.ezproxy.lib.ucalgary.ca

"Interim report on Mississippian Arroyo Penasco Formation of North-Central New Mexico". 1997.

usgs.gov

pubs.usgs.gov

Duncan, Helen M. "Ordovician and Silurian Coral Faunas of Western United States" (PDF).
Hardin, George C. "Babb Fault System, Crittenden and Livingston Counties" (PDF). United States Geological Survey. Retrieved 30 March 2012.

minerals.usgs.gov

"Mineral of the Month: Fluorspar" (PDF). United States Geological Survey. Retrieved 30 March 2012.

web.archive.org

Flower & Berdan. "Memorial to Helen M. Duncan" (PDF). rock.geosociety.org. The Geological Society of America. Archived from the original (PDF) on 2018-05-02. Retrieved 30 November 2016.