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- Agriculture 173
- Universities and colleges--Periodicals 169
- Rivers--Oregon 58
- Forests and forestry 54
- Roads 51
- Bridges 50
- Coasts--Oregon 45
- Redwoods 30
- Formations (Geology) 29
- Lakes--Oregon 29
- Cities and towns 28
- Fishing 23
- Mountains--Oregon 20
- Lumber trade 15
- Stores, Retail 15
- Boats 14
- Coasts--California 14
- Indians of North America--Oregon 14
- Siletz Indian Reservation (Or.) 14
- Siletz Indians 14