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- Geological Survey (U.S.)526
- United States51
- U.S. Atomic Energy Commission42
- United States. Bureau of Land Management39
- Billingsley, George H.38
- Geological Survey (U.S.), issuing body26
- United States. Bureau of Indian Affairs, issuing body26
- National Applied Resource Sciences Center (U.S.)25
- Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)24
- United States. Bureau of Land Management. Arizona State Office24
- United States. Bureau of Reclamation24
- Cooley, M. E. (Maurice E.)22
- United States. National Park Service21
- Drewes, Harald, 1927-19
- Irwin, J. H.18
- Pallister, John S.17
- Stevens, Peter R. (Peter Ryan), 1924-17
- Krieger, Medora Louise Hooper, 1905-199416
- United States. Bureau of Indian Affairs16
- Akers, J. P.15