- Oregon State Board Of Forestry2
- Oregon State College. Federal Cooperative Extension Service2
- Oregon State University. Extension Service2
- Robinson, Dan D.2
- Berry, Dick Wallace, 1914 1
- Chilcote, David O.1
- Gartz, Jack Frederick1
- Miller, Don J.1
- Ross, Charles R.1
- Whitson, Tom D.1
- Youngberg, Harold Wayne, 1929 1