- United States. Soil Conservation Service25
- Oregon. State Water Resources Board9
- United States. Department Of Agriculture. Economic Research Service9
- United States. Forest Service9
- Upper Willamette Resource Conservation And Development Project9
- Usda Field Advisory Committee6
- Usda Oregon River Basin Survey Party6
- Oregon State University. Agricultural Experiment Station2
- Ralphs, H. H.2
- Upper Willamette Resource Conservation And Development Area2
- Balster, Clifford A.1
- Carnahan, H. E.1
- Fessel, W. C.1
- Moore, James A. (James Allan), 1939 1
- Oregon Coastal Conservation And Development Commission1
- Oregon State Board Of Higher Education1
- Oregon State College. Agricultural Experiment Station1
- Parsons, Roger Bruce, 1932 1
- Raitt, D. D.1
- Smith, K. K.1