- United States. Forest Service. Northern Region. State & Private Forestry23
- Forest Products Laboratory (U.S.)13
- Mcgregor, Mark D.11
- Oregon State University. Forest Research Laboratory9
- United States. Forest Service. Northern Region8
- James, Robert L.6
- Meyer, Hubert E.6
- Blew, Joseph Oscar, 1904 5
- Dewey, Jerald E.5
- Kulp, John W.5
- Gibson, Kenneth E.4
- Tunnock, Scott4
- Western Dry Kiln Clubs4
- Carlson, Clinton E.3
- Kohler, Steve3
- Pacific Northwest Forest And Range Experiment Station (Portland, Or.)3
- Western Dry Kiln Clubs. Meeting (7th : 1955 : Klamath Falls, Or.)3
- Black, Hugh C., 1941 2
- Bousfield, Wayne E.2
- Dimock, Edward J.2