- Contributor:
- Chamberlin, Thomas C. (Thomas Chrowder), 1843-1928; Wisconsin. Geological Survey
- Created:
- 1881
- Contributed By:
- University of Minnesota Libraries, John R. Borchert Map Library.
- Last Updated:
- 2021-07-19
- Creator:
- Irving, Roland Duer, 1847-1888
- Contributor:
- Chamberlain, T. C; Wright, Charles E; Tullock, Seymour W; Wisconsin. Geological Survey; Milwaukee Lith. & Engr. Co
- Created:
- 1878
- Contributed By:
- University of Minnesota Libraries, John R. Borchert Map Library.
- Last Updated:
- 2021-07-19