Contributor
- Armstrong, Jack N.1
- Baker, Frank H.1
- Bell, John F.1
- Carey, Andrew G., jr.1
- Cowley, W. H.1
- Cutshall, Norman1
- Dilworth, J. R.1
- Forster, William O.1
- Mack, H. J.1
- Mattson, Donald1
- Mccauley, James E.1
- Oregon State College. Federal Cooperative Extension Service1
- Oregon State University. Cooperative Extension Service1
- Pacific Northwest Cooperative Extension1
- Pacific Northwest Water Laboratory1
- Pearcy, William G.1
- Ralston, A. T.1
- Renfro, William C.1
- University Of Idaho. Cooperative Extension Service1