Contributor
- Frazier, W. A.2
- Mack, H. J.2
- Vaughan, E. K.2
- Bell, John F.1
- Dilworth, J. R.1
- Morrison, H. E.1
- Oregon State College. Federal Cooperative Extension Service1
- Oregon State University. Cooperative Extension Service1
- Pacific Northwest Cooperative Extension1
- Torvik, Sharon1
- University Of Idaho. Cooperative Extension Service1
- Varseveld, George1