- Oregon State University. Extension Service33
- Oregon State University. Agricultural Experiment Station18
- Oregon State University9
- Landgren, Chal G.5
- Ahrens, Glenn R.4
- Bennett, Max, 1963 4
- Withrow Robinson, Bradford A.4
- Barstow, Dennis3
- Bondi, Michael C.3
- Duddles, Ralph E.3
- Emmingham, William H.3
- Fitzgerald, Stephen Arthur3
- Oregon State University. Forest Research Laboratory3
- Pacific Northwest Cooperative Extension3
- Wyatt, Bruce3
- Adamus, Paul R.2
- Anderson, James J. (James Jay)2
- Baldwin, Rebecca E. B.2
- Campbell, Adam L.2
- Edge, W. Daniel2