- Oregon State University. Forest Research Laboratory35
- Smith, Robert L. (Robert Lloyd), 1935 33
- Brunner, Jay F.31
- Oregon State University. College Of Forestry31
- Gartner, Barbara L.30
- Fisher, Glenn C.29
- Webster, Janet G.28
- Fleischbein, Jane27
- Thomas, Samuel27
- Hart, John M. (John Mervyn), 1947 26
- Oregon State University. Klamath Basin Research And Extension Center25
- Tetrick, Kurt25
- United States. Forest Health Protection25
- Boock, Michael24
- Chelton, Dudley B.24
- Cusack, Kate24
- United States. Forest Service. Northern Region24
- Burnett, Margaret, 1949 22
- Mellinger, Margaret22
- Myers, James R.22