Illinois-Wisconsin (Winnebago County), Rockford quadrangle : topography

Chicago citation style
Geological Survey (U.S.). Illinois-Wisconsin (Winnebago County), Rockford quadrangle : topography. 1918. Retrieved from the Digital Public Library of America, https://digital.library.illinois.edu/items/9ff421b0-994e-0134-2096-0050569601ca-3. (Accessed April 17, 2021.)
APA citation style
Geological Survey (U.S.), (1918) Illinois-Wisconsin (Winnebago County), Rockford quadrangle : topography. Retrieved from the Digital Public Library of America, https://digital.library.illinois.edu/items/9ff421b0-994e-0134-2096-0050569601ca-3
MLA citation style
Geological Survey (U.S.). Retrieved from the Digital Public Library of America <https://digital.library.illinois.edu/items/9ff421b0-994e-0134-2096-0050569601ca-3>.
Note: These citations are programmatically generated and may be incomplete.