Alvin

Chicago citation style
Geological Survey (U.S. Alvin. 1970. Retrieved from the Digital Public Library of America, http://content.wisconsinhistory.org/cdm/ref/collection/maps/id/1985. (Accessed April 4, 2020.)
APA citation style
Geological Survey (U.S, (1970) Alvin. Retrieved from the Digital Public Library of America, http://content.wisconsinhistory.org/cdm/ref/collection/maps/id/1985
MLA citation style
Geological Survey (U.S. Retrieved from the Digital Public Library of America <http://content.wisconsinhistory.org/cdm/ref/collection/maps/id/1985>.
Note: These citations are programmatically generated and may be incomplete.