Cite

Citation Info Geological Survey (U.S.). Illinois (Iroquois county), Gilman quadrangle : 15-minute series. [JPEG2000]. Geological Survey Division (Urbana, Ill.), 1946.. U.S. Geological Survey (Washington, D.C.). Retrieved from https://geo.nyu.edu/catalog/93a13130-82d4-0134-1f08-0050569601ca-0

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