Stössel, Iwan; Williams, Edward A.; Higgs, Kenneth T. (15. november 2016): [Ichnology and depositional environment of the Middle Devonian Valentia Island tetrapod trackways, south-west Ireland], Palaeogeography, Palaeoclimatology, Palaeoecology. 462: 16–40. Bibcode:2016PPP...462...16S. doi:10.1016/j.palaeo.2016.08.033. ISSN 0031-0182.
harvard.edu
ui.adsabs.harvard.edu
Stössel, Iwan; Williams, Edward A.; Higgs, Kenneth T. (15. november 2016): [Ichnology and depositional environment of the Middle Devonian Valentia Island tetrapod trackways, south-west Ireland], Palaeogeography, Palaeoclimatology, Palaeoecology. 462: 16–40. Bibcode:2016PPP...462...16S. doi:10.1016/j.palaeo.2016.08.033. ISSN 0031-0182.
Buchanan, Keith (21. juni 2013): The Telegraph Field with transatlantic telegraph cable station - Valentia Island, Ireland - Anglo American Cable House. Arkivert fra originalen den 21. juni 2013. Sitat: «Also known as "The Longitude Field". Prior to the transatlantic telegraph, American longitude measurements had a 850-metre (2,800-foot) uncertainty with respect to European longitudes. A temporary longitude observatory was built adjacent to the Foilhommerum Cable Station to facilitate synchronized longitude observations with Heart's Content [Cable Station], Newfoundland.»
Buchanan, Keith (21. juni 2013): The Telegraph Field with transatlantic telegraph cable station - Valentia Island, Ireland - Anglo American Cable House. Arkivert fra originalen den 21. juni 2013. Sitat: «Also known as "The Longitude Field". Prior to the transatlantic telegraph, American longitude measurements had a 850-metre (2,800-foot) uncertainty with respect to European longitudes. A temporary longitude observatory was built adjacent to the Foilhommerum Cable Station to facilitate synchronized longitude observations with Heart's Content [Cable Station], Newfoundland.»
worldcat.org
Hampton, Dan (2017): The flight : Charles Lindbergh's daring and immortal 1927 Transatlantic crossing (1. utg.). New York, NY: HarperCollins. ISBN 978-0-06-246439-2. OCLC 957504448; s. 189
Stössel, Iwan; Williams, Edward A.; Higgs, Kenneth T. (15. november 2016): [Ichnology and depositional environment of the Middle Devonian Valentia Island tetrapod trackways, south-west Ireland], Palaeogeography, Palaeoclimatology, Palaeoecology. 462: 16–40. Bibcode:2016PPP...462...16S. doi:10.1016/j.palaeo.2016.08.033. ISSN 0031-0182.
