- Upper Willamette Resource Conservation And Development Project30
- Oregon State University. Agricultural Experiment Station17
- Oregon State University Extension Service. Resource Conservation And Development Project Office11
- United States. Soil Conservation Service10
- Oregon State University. Extension Service5
- Upper Willamette Resource Conservation And Development Area5
- Boersma, L.4
- Oregon State College. Agricultural Experiment Station4
- Bates, Earl M.3
- Conklin, Frank S.3
- Calhoun, Wheeler, 1916 2
- Greene, Charles H. (Charles Henry), 1932 2
- Jackson, T. L. (Thomas Lloyd), 1922 2
- Klock, Glen O.2
- Mack, H. J. (Harry John), 1926 2
- Shearer, Marvin N.2
- Balster, Clifford A.1
- Bartlett, Alexi1
- Besse, Ralph S. (Ralph Stephen), 1887 1
- Bradshaw, R. Carlyle1