- Andrew B. Graham Co (7)
- Campbell, Marius R. (Marius Robinson), 1858-1940 (5)
- Bond, Frank, 1856-1940 (4)
- Bauman, Wm. (William) (3)
- Hendges, M (3)
- Dinsmore, A. F (2)
- Helm, Charles J (2)
- Bauman, Jr., William (1)
- Berthrong, I. P (1)
- Geological Survey (U.S.) (1)
- Geological Survey of Canada (1)
- Goode, Richard Urquhart, 1858-1903 (1)
- Haehnlen, Jacob, 1824- (1)
- Kentucky Geological Survey (1)
- King, Harry, C.E (1)
- O'Hare, Daniel (1)
- Peabody Coal Company. Illinois Division (1)
- Pennsylvania. Bureau of Topographic and Geologic Survey (1)
- Rand McNally and Company (1)
- Richardson, James (Geologist) (1)