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Topic
- Agriculture 23
- Oregon State University. Extension Service 13
- Lichens 12
- Harvesting 10
- Farm ownership 9
- Farm tenancy--Economic aspects 9
- Potatoes 7
- Mexican American agricultural laborers 6
- Farms--Oregon 5
- Forests and forestry 5
- Indians of North America 5
- Ranches--Oregon 5
- Fishing 4
- Roads 4
- Agricultural laborers 3
- Irrigation canals and flumes 3
- Lakes--Oregon 3
- Mountains--Oregon 3
- Onions 3
- Salvage 3
