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Topic
- Graminaceae 114
- Agriculture 36
- Harvesting 25
- Agricultural machinery 21
- Trees 21
- Croplands 20
- Dwellings 10
- Men 9
- outdoor photographs 9
- Mountains 7
- Barns 6
- Landscapes 6
- Oregon Agricultural College. Experiment Station 6
- Oregon State Agricultural College. Experiment Station 6
- Oregon State University. Extension Service 6
- Tall fescue 6
- Tipis 6
- Women 6
- Hats 5
- Indians of North America 5
