1. Galatia Yale Public content 1908. 2011-12-12T21:25:54Z. 2022-03-29T20:39:14Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois.
2. Waukegan Yale Public content 1908. 2011-12-12T21:26:24Z. 2022-03-29T20:39:21Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois and Wisconsin.
3. Wheaton Yale Public content 1908. 2011-12-12T21:26:25Z. 2022-03-29T20:39:21Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois.
4. Wisconsin-Iowa-Illinois Lancaster Quadrangle Yale Public content 1908. 2011-05-25T16:49:19Z. 2015-10-21T14:59:56Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois, Iowa, and Wisconsin.