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Author/Creator
- Fullerton, David S.[remove]10
- Geological Survey (U.S.)10
- Richmond, Gerald Martin, 1914-5
- Ontario Geological Survey3
- Sado, E. V.3
- Christiansen, Ann Coe2
- Minnesota Geological Survey2
- University of Michigan. Department of Geological Sciences2
- Farrand, William R., 1931-20111
- Gadd, N. R.1
- Geological Survey of Canada1
- Gray, Henry Hamilton, 1922-1
- Hallberg, George R.1
- Hartshorn, Joseph H. (Joseph Harold), 1922-1
- Howard, Alan D.1
- Indiana. Geological Survey1
- Iowa Geological Survey1
- Manitoba. Department of Energy and Mines1
- North Dakota Geological Survey1
- Pennsylvania. Bureau of Topographic and Geologic Survey1