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Powder River (Wyoming and Montana) - Wikipedia
Livestock Handling Equipment | Powder River Equipment
The Powder River Basin: A Natural History | WyoHistory.org
Powder River Basin - Wikipedia
Middle Fork Powder River | Bureau of Land Management
Powder River | river, United States | Britannica
Powder River: Data for Cross-Channel Profiles at 22 Sites in ...
Powder River Country Offers Picturesque Montana Prairie
A Geological History of the Powder River Basin - Williams College
North Fork of the Powder River WSA | Bureau of Land Management