- United States. Bureau Of Land Management320
- Klamath Falls Resource Area315
- Oregon State University. Agricultural Experiment Station41
- Oregon State University. Extension Service32
- Huyer, Adriana, 1945 25
- Smith, Robert L. (Robert Lloyd), 1935 25
- United States. Forest Health Protection25
- Wheeler, Patricia A.25
- Fleischbein, Jane24
- Kosro, P. Michael, 1951 24
- United States. Forest Service. Northern Region24
- Oregon State University. Forest Research Laboratory22
- Peterson, W. T.18
- Barth, Jack A.17
- Sherr, Barry F.13
- Sherr, Evelyn13
- Geyer, Nancy A.11
- James, Robert L.11
- National Marine Fisheries Service, Northwest Region10
- United States. Agricultural Research Service10