Hauer

Chicago citation style
Geological Survey (U.S. Hauer. 1971. Retrieved from the Digital Public Library of America, http://content.wisconsinhistory.org/cdm/ref/collection/maps/id/2393. (Accessed December 10, 2019.)
APA citation style
Geological Survey (U.S, (1971) Hauer. Retrieved from the Digital Public Library of America, http://content.wisconsinhistory.org/cdm/ref/collection/maps/id/2393
MLA citation style
Geological Survey (U.S. Retrieved from the Digital Public Library of America <http://content.wisconsinhistory.org/cdm/ref/collection/maps/id/2393>.
Note: These citations are programmatically generated and may be incomplete.