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- Geological Survey (U.S.)45
- Geological Survey (U.S.), issuing body41
- United States. Congress. House31
- United States. Geological Survey30
- Project Muse28
- McGlashan, H.D., (Harry Deyoe)13
- Grover, Nathan Clifford11
- Henshaw, Fred F., (Fred Forbes)11
- Harrill, James R.10
- Quigley, Thomas M. (Thomas Milton)9
- United States9
- United States. Bureau of Land Management9
- Bedinger, M. S.8
- Follansbee, Robert8
- Forest and Rangeland Ecosystem Science Center (U.S.)8
- Sargent, Kenneth A.8
- United States. Forest Service. Intermountain Region, author8
- Pacific Northwest Research Station (Portland, Or.)7
- Prudic, David E.7
- Purton, A.B.7