- United States. Department Of Agriculture44
- Cowgill, Helen Julia40
- Mumford, D. Curtis (Dwight Curtis), 1900 40
- Potter, E. L. (Ermine Lawrence), 1884 40
- Jenkins, Lawrence39
- Oregon State College. Engineering Experiment Station39
- Oregon. Dept. Of Geology And Mineral Industries37
- Washington State University. Cooperative Extension36
- University Of Idaho. Cooperative Extension Service35
- Forest Products Laboratory (U.S.)34
- Oregon State University. Water Resources Research Institute32
- Oregon State University. Federal Cooperative Extension Service31
- Powers, W. L. (Wilbur Louis), 188731
- Breithaupt, L. R. (Le Roy), 1886 30
- Hatfield Marine Science Center28
- Oregon State University28
- Warren, Rex28
- Washington State University. Extension28
- Dryden, James, 1863 26
- United States. Forest Service26