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- Rivers--Oregon 194
- Lumber trade 101
- Portraits, Group 86
- Forests and forestry 73
- Mountains--Oregon 68
- Lakes--Oregon 55
- Cities and towns 46
- Waterfalls 44
- Agriculture 42
- Formations (Geology) 42
- Log transportation 39
- Bridges 34
- Coasts--Oregon 33
- Roads 29
- Logging 27
- Sawmills 26
- Railroad tracks 24
- Springs 24
- Rodeos 22
- Pendleton Round-Up 21