Geologic map of South America / prepared under the direction of a committee of the Geological Society of America in cooperation with the American Geographical Society and the U.S. Geological Survey from maps contributed by government bureaus of South American countries and other sources

Chicago citation style
Geologic map of South America / prepared under the direction of a committee of the Geological Society of America in cooperation with the American Geographical Society and the U.S. Geological Survey from maps contributed by government bureaus of South American countries and other sources. 1950. Retrieved from the Digital Public Library of America, http://collections.lib.uwm.edu/cdm/ref/collection/agdm/id/18319. (Accessed December 10, 2019.)
APA citation style
(1950) Geologic map of South America / prepared under the direction of a committee of the Geological Society of America in cooperation with the American Geographical Society and the U.S. Geological Survey from maps contributed by government bureaus of South American countries and other sources. Retrieved from the Digital Public Library of America, http://collections.lib.uwm.edu/cdm/ref/collection/agdm/id/18319
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.lib.uwm.edu/cdm/ref/collection/agdm/id/18319>.
Note: These citations are programmatically generated and may be incomplete.