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Author/Creator
- Geological Survey (U.S.)318
- Geological Survey (U.S.), issuing body27
- Cobb, Edward Huntington, 1916-24
- United States. Bureau of Land Management16
- Bullock, John H.13
- Pilcher, Steven H.13
- United States. Bureau of Mines12
- Bliss, James D.7
- Hudson, Travis, 1946-7
- Nokleberg, Warren J.7
- Orris, G. J.6
- Rossiĭskai︠a︡ akademii︠a︡ nauk6
- United States. Forest Service6
- Adrian, Betty M.5
- Bookstrom, Arthur A.5
- Diggles, M. F.5
- Eppinger, R. G.5
- Long, Keith R.5
- McHugh, John B.5
- Nelson, Steven W.5