1. Danvers, Ill Yale Public content 1930. 2011-12-12T21:25:48Z. 2022-03-29T20:39:14Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois.
2. Map of Illinois showing state highways Yale Public content 1930. 2011-02-01T21:26:32Z. 2015-04-16T18:16:57Z. Illinois. Division of Highways. State of Illinois, Department of Public Works and Buildings, Division of Highways. English. Public. Illinois.
3. Normal, Ill Yale Public content 1930. 2011-12-12T21:26:12Z. 2022-03-29T20:39:16Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois.
4. Pearl, Ill.-Mo. Yale Public content 1930. 2011-12-12T21:26:14Z. 2022-03-29T20:39:17Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois and Missouri.
5. Springfield, Ill Yale Public content 1930. 2011-12-12T21:26:19Z. 2022-03-29T20:39:20Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois.
6. Topographic map of Hardin County and adjoining part of Pope County, Illinois [cartographic material] Yale Public content 1930. 2018-05-14T19:33:55Z. 2018-09-05T19:40:47Z. Illinois State Geological Survey. U.S. Geological Survey. English. cartographic image. Public. Hardin County (Ill.), Illinois, and Hardin County.