Fossil forests of the Yellowstone National Park.
|Main Author:||Knowlton, Frank Hall, 1860-1926.|
Washington, Govt. Print. Off., 1921.
> Yellowstone National Park.
Petrified forests > Yellowstone National Park.
"Publications on Yellowstone national park": p. 30.
At head of title: Department of the interior. Albert B. Fall, secretary. National park service. Stephen T. Mather, director.
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