Creator
- Spies, Thomas A.10
- Bae, Harold9
- Sebastiani, Paola9
- Jackson, T. L. (Thomas Lloyd), 1922 7
- Zald, Harold S. J.7
- Perls, Thomas6
- Youngberg, Harold Wayne, 1929 6
- Doerge, Thomas A.5
- Gardner, Ernest Hugh5
- Gardner, E. Hugh4
- Gatziolis, Demetrios4
- Huso, Manuela4
- Oregon State University. Extension Service4
- Youngberg, Harold4
- Andersen, Stacy3
- Bolund, Lars3
- Cao, Hongzhi3
- Chen, Huashuai3
- Chi, Li Qing3
- Christensen, Kaare3