- Creator:
- Jillson, Willard Rouse, 1890-1975
- Contributor:
- Sellier, L. M. (Lucien M.); Kentucky Geological Survey
- Created:
- 1920
- Contributed By:
- University of Minnesota Libraries, John R. Borchert Map Library.
- Last Updated:
- 2021-05-17
- Creator:
- Geological Survey (U.S.)
- Contributor:
- Campbell, Marius R. (Marius Robinson), 1858-1940
- Created:
- 1925
- Contributed By:
- University of Minnesota Libraries, John R. Borchert Map Library.
- Page Count:
- 2
- Last Updated:
- 2022-05-03
- Creator:
- Richardson, G. B. (George Burr), 1872-1949
- Contributor:
- Pusey, Lewis B; Geological Survey (U.S.)
- Created:
- 1927
- Contributed By:
- University of Minnesota Libraries, John R. Borchert Map Library.
- Page Count:
- 2
- Last Updated:
- 2022-04-18
- Creator:
- Pennsylvania. Bureau of Topographic and Geologic Survey
- Created:
- 1916
- Contributed By:
- University of Minnesota Libraries, John R. Borchert Map Library.
- Last Updated:
- 2022-04-18