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- United States. Forest Service. Pacific Northwest Region49
- Geological Survey (U.S.)36
- United States. Forest Service27
- Geological Survey (U.S.), issuing body23
- United States. Bureau of Land Management. Oregon State Office18
- United States. Bureau of Land Management14
- Pacific Northwest Research Station (Portland, Or.)13
- United States. Forest Service, author11
- Anderson, Chauncey W.10
- Rinella, Frank A.10
- United States. Forest Service, issuing body10
- Detroit Ranger District (Or.), author9
- United States. Bureau of Land Management. Prineville District9
- Rounds, Stewart8
- Tanner, Dwight Q.8
- United States. Army. Corps of Engineers. Portland District8
- Hinkle, Stephen R.7
- United States. Bureau of Land Management. Medford District7
- Wood, Tamara M.7
- Malheur National Forest (Agency : U.S.), author6