Most Popular Books
- Structure of Herrin (no. 6) Coal Bed in Christian and Montgomery Counties and Adjacent Parts of Fayette, Macon, Sangamon, and Shelby Counties
- Subsurface Geology of the Chester Series in Illinois: Subsurface Geology of the Iowa (lower Mississippian) Series in Illinois; Report of Investigations No. 61
- Subsurface Geology of the Chester Series in Illinois: Subsurface Geology of the Iowa (lower Mississippian) Series in Illinois; Report of Investigations No. 61


