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Geologic map of the Eastern Pioneer Mountains, Beaverhead County, Montana
1 map ; 92 x 46 cm., on sheet 103 x 122 cm., folded in envelope 25 x 32 cm.
Relief shown by contour lines and spot heights.
Text, 2 index maps, and 2 cross sections included on sheet.
Eastern Pioneer Mountains, Beaverhead County, Montana
Miscellaneous field studies (Geological Survey (U.S.)) ; map MF-1806-A