- Oregon State University. Extension Service118
- Gardner, E. Hugh94
- Oregon State University. Agricultural Experiment Station92
- Gardner, Ernest Hugh64
- Jackson, T. L.56
- Oregon Agricultural College. Experiment Station45
- Forest Products Laboratory (U.S.)44
- Jackson, T. L. (Thomas Lloyd), 1922 37
- Oregon State University32
- Oregon State University. Forest Research Laboratory28
- Mansour, N. S.27
- Oregon State College. Extension Service25
- Lane County Historical Society (Or.)23
- Doerge, Thomas A.22
- Oregon State College. Agricultural Experiment Station22
- United States. Forest Service. Pacific Northwest Region. Thirty Year Club21
- Hansen, Hugh J.19
- Hart, John M. (John Mervyn), 1947 19
- Stebbins, Robert L.19
- Mack, H. J.18