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- Universities and colleges--Faculty 57
- Agriculture 46
- Grasses--Research 41
- Tall fescue 11
- Portraits, Group 10
- Self-pollination 8
- Agronomic Crop Science 4
- Cowan, J. Ritchie (John Ritchie) 4
- Foote, Wilson H. 4
- Oregon State University. Agricultural Experiment Station 4
- Portraits 4
- Agricultural machinery 3
- Cherry 2
- Cooney, Wilbur T. 2
- Deans (Education) 2
- Orchards 2
- Poultry Science 2
- Ryegrasses 2
- Graminaceae 1
- Harvesting 1