Region
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Cody Region (Wyo.)
1
Coffeyville
1
Coffeyville (Kan.)
1
Colorado
24
Colorado Plateau
2
Colorado River
4
Colorado River (Colo.-Mexico)
18
Colorado River Region (Colo.-Mexico)
1
Colorado River Valley (Colo.-Mexico)
3
Colorado River Watershed
29
Colorado River Watershed (Colo.-Mexico)
50
Columbia River
24
Columbia River Watershed
7
Comstock Lode (Nev.)
2
Confederate States of America
2
Cook Inlet
1
Corinne (Utah)
2
Crazy Horse Memorial (Black Hills, S.D.)
1
Crosby County
1
Dakota Territory
1
Death Valley (Calif. and Nev.)
1
Denver
4
Denver (Colo.)
2
Deserts
1
Devils Tower National Monument (Wyo.)
1
Dodge City (Kan.)
1
Duchesne
1
Duluth
1
Duluth (Minn.)
1
Earth (Planet)
1
Elko County
2
Elko County (Nev.)
2
Elwha River Valley (Wash.)
1
England
5
Environmental aspects
1
Etats-Unis
1
Europe
4
Europe, Central
1
Excavations (Archaeology)
2
Farmington (Utah)
2
Ferry County
1
Flathead Indian Reservation (Mont.)
2
Fort Hall Indian Reservation
1
Fort Laramie (Wyo. : Fort)
1
Fort Steele Trail (B.C. and Mont.)
1
France
1
Frontier and pioneer life
3
Georgia
1
Germany
2
Glarus (Switzerland : Canton)
1
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