Creator
- Forest Products Laboratory (U.S.)994
- Oregon State University. Agricultural Experiment Station818
- Oregon State University. Extension Service634
- Oregon State College. Agricultural Experiment Station399
- Oregon State College. Federal Cooperative Extension Service198
- Oregon Agricultural College. Experiment Station189
- Oregon State University. Forest Research Laboratory185
- Oregon State Agricultural College. Agricultural Experiment Station152
- U.S. International Biological Program. Coniferous Forest Biome141
- Oregon. Fish Commission117
- University Of Washington115
- Pacific Northwest Forest And Range Experiment Station (Portland, Or.)113
- Oregon State College. Extension Service96
- Oregon. Department Of Fish And Wildlife86
- United States. Forest Service. Northern Region. State & Private Forestry86
- Oregon Agricultural Experiment Station82
- Oregon State Agricultural College. Extension Service82
- Oregon Agricultural College. Extension Service66
- United States. Department Of Agriculture64
- United States. Forest Service64