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Author/Creator
- Geological Survey (U.S.)9
- Fullerton, David S.2
- Minnesota Geological Survey2
- Denson, N. M. (Norman MacLaren), 1914-1
- Dyman, T. S.1
- Franczyk, Karen J.1
- Graff, P. J.1
- Grundy, W. D.1
- Hon, Ken1
- Houston, Robert S. (Robert Stroud), 1923-1
- Lanphere, Marvin A., 1933-1
- Manitoba. Department of Energy and Mines1
- North Dakota Geological Survey1
- Ontario Geological Survey1
- Pierson, Charles Thomas, 1918-1
- Reheis, Marith C.1
- Sado, E. V.1
- Sawyer, Thomas L.1
- Slate, Janet L.1
- South Dakota Geological Survey1