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Cartographic material -- Monograph X Montana X Keefer, William Richard, 1924- X
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Energy resources map of the Powder River Basin, Wyoming and Montana

Published: Reston, Va. : Interior--Geological Survey, 1973
Format: Map
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Geologic map of the west half of the Neihart 15-minute quadrangle, central Montana

Published: Washington, D.C. : U.S. Geological Survey, 1972
Format: Map
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