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- Railroads--Colorado--Pictorial works17
- Landscape photography10
- Rock formations--Colorado--El Paso County10
- Landscape photography--West (U.S.)9
- Railroad tunnels4
- Apache Indians--Pictorial works1
- Discoveries in geography--American--Pictorial works1
- Frontier and pioneer life--Pictorial works1
- Navajo Indians--Pictorial works1
- Pueblos--Pictorial works1
- Railroad travel--West (U.S.)--Pictorial works.1
- Zuni Indians--Pictorial works1
