Swanson

Chicago citation style
Geological Survey (U.S. Swanson. 1982. Retrieved from the Digital Public Library of America, http://content.wisconsinhistory.org/cdm/ref/collection/maps/id/3033. (Accessed January 25, 2020.)
APA citation style
Geological Survey (U.S, (1982) Swanson. Retrieved from the Digital Public Library of America, http://content.wisconsinhistory.org/cdm/ref/collection/maps/id/3033
MLA citation style
Geological Survey (U.S. Retrieved from the Digital Public Library of America <http://content.wisconsinhistory.org/cdm/ref/collection/maps/id/3033>.
Note: These citations are programmatically generated and may be incomplete.