Illinois-Wisconsin, Grays Lake quadrangle : topography

Chicago citation style
Geological Survey (U.S.). Illinois-Wisconsin, Grays Lake quadrangle : topography. 1923. Retrieved from the Digital Public Library of America, https://digital.library.illinois.edu/items/944efd00-82d4-0134-1f08-0050569601ca-7. (Accessed April 17, 2021.)
APA citation style
Geological Survey (U.S.), (1923) Illinois-Wisconsin, Grays Lake quadrangle : topography. Retrieved from the Digital Public Library of America, https://digital.library.illinois.edu/items/944efd00-82d4-0134-1f08-0050569601ca-7
MLA citation style
Geological Survey (U.S.). Retrieved from the Digital Public Library of America <https://digital.library.illinois.edu/items/944efd00-82d4-0134-1f08-0050569601ca-7>.
Note: These citations are programmatically generated and may be incomplete.