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Author/Creator
- Geological Survey (U.S.)43
- Montana Bureau of Mines and Geology6
- United States. Congress. Senate. Committee on Energy and Natural Resources5
- United States. Bureau of Land Management4
- Weed, Walter Harvey, 1862-19444
- Harrison, Jack Edward, 1924-3
- Lawson, D. C.3
- Lindgren, Waldemar, 1860-19393
- Reeves, Frank, 1886-3
- Torrey, Alfred E.3
- United States. Congress. Senate. Committee on Environment and Public Works3
- Alden, William C. (William Clinton), 1871-19592
- Bass, N. Wood (Nathan Wood), 1893-2
- Bowen, C. F. (Charles F.), 1871-19532
- Brandt, Ted R., 1954-2
- Briar, David W.2
- Bryson, Robert P., 1911-2
- Calkins, Frank C.2
- Calkins, Frank C., 1878-19742
- Calvert, William R.2