Author/Creator
- United States. Department of the Interior6
- Billingsley, George H.5
- Griffitts, Wallace R.5
- Hinkle, Margaret E.5
- Missouri. Division of Geology and Land Survey5
- Moore, Richard B. (Richard Beresford), 1945-5
- Ryder, Robert T.5
- Sims, P. K. (Paul Kibler), 1918-20115
- Snyder, George L. (George Leonard), 1927-5
- United States. Department of Energy5
- Bohannon, Robert G.4
- Dover, James H.4
- Du Bray, E. A.4
- Minnesota Geological Survey4
- Pierson, Charles Thomas, 1918-4
- Ratcliffe, Nicholas M. (Nicholas Morley), 1938-4
- Reheis, Marith C.4
- Scott, David Holcomb, 1916-4
- Sherrod, David R.4
- United States. Bureau of Indian Affairs4