Creator
- Hamm, Philip B.18
- Oregon State University. Extension Service9
- Clough, George6
- Hamm, Philip6
- Alderman, Stephen C.5
- Rondon, Silvia I.5
- Walenta, Darrin L.5
- Nolte, Phillip4
- Oregon State University4
- Akerblom, Jonas3
- Berlin, Sofia3
- Beuch, Ulrike3
- David, Nick3
- Dung, Jeremiah3
- Gieck, Stacy3
- Hermann, Richard K.3
- Kosman, Evsey3
- Martin, Ruth C.3
- Olsen, Nora3
- Clough, George H., 1945 2