Illinois-Wisconsin Harvard quadrangle

Chicago citation style
Geological Survey (U.S.). Illinois-Wisconsin Harvard quadrangle. 1937. Retrieved from the Digital Public Library of America, https://digital.library.illinois.edu/items/95482720-82d4-0134-1f08-0050569601ca-9. (Accessed April 17, 2021.)
APA citation style
Geological Survey (U.S.), (1937) Illinois-Wisconsin Harvard quadrangle. Retrieved from the Digital Public Library of America, https://digital.library.illinois.edu/items/95482720-82d4-0134-1f08-0050569601ca-9
MLA citation style
Geological Survey (U.S.). Retrieved from the Digital Public Library of America <https://digital.library.illinois.edu/items/95482720-82d4-0134-1f08-0050569601ca-9>.
Note: These citations are programmatically generated and may be incomplete.