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otto l schumacher
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Magnificent Journey, A Geologic River Trip with Lewis and Clark through the Upper Missouri River Breaks National Monument
Otto L. Schumacher, Lee A. Woodward · Woodhawk Press
152 sayfa · 2004
Expeditions & Discoveries / History / History: World
Federal land status in the Overthrust Belt of Idaho, Montana, Utah, and Wyoming, 1979
Otto L. Schumacher · U.S. Dept. of the Interior, Bureau of Mines
22 sayfa · 1979
Public lands / Oil and gas leases / Mining leases