Bruce

Chicago citation style
Geological Survey (U.S. Bruce. 1972. Retrieved from the Digital Public Library of America, http://content.wisconsinhistory.org/cdm/ref/collection/maps/id/2120. (Accessed January 26, 2020.)
APA citation style
Geological Survey (U.S, (1972) Bruce. Retrieved from the Digital Public Library of America, http://content.wisconsinhistory.org/cdm/ref/collection/maps/id/2120
MLA citation style
Geological Survey (U.S. Retrieved from the Digital Public Library of America <http://content.wisconsinhistory.org/cdm/ref/collection/maps/id/2120>.
Note: These citations are programmatically generated and may be incomplete.