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Subject (Topic)
- Railroad travel--West (U.S.)--Pictorial works.5
- Frontier and pioneer life--Pictorial works3
- Frontier and pioneer life--Pictorial works.2
- Geologists--United States.2
- Geology--California--Nevada County.2
- Geology--Panama.2
- Geology--West (U.S.)2
- Gold miners--United States.2
- Gold mines and mining--California.2
- Mining engineers--United States.2
- Witoto Indians--Portraits.2
- Cliff-dwellings--Pictorial works.1
- Cowboys--Colorado1
- Hopi Indians--Rites and ceremonies--Pictorial works.1
- Indians of North America--Southwest, New--Pictorial works.1
- Kivas--Southwest, New--Pictorial works.1
- Mines and mineral resources--Montana--Pictorial works.1
- Navajo Indians--Pictorial works.1
- Pueblo Indians--Pictorial works.1
- Ranches--Colorado--Pictorial works1