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A pleistocene ice sheet in the northern boulder mountains Jefferson, powell, and lewis and Clark counties, Montana / by Edward T. Ruppel.

By: RUPPEL, Edward T.
Material type: materialTypeLabelBookSeries: Geological Survey Bulletin; 1141-G.Publisher: Washington : United States Government Printing Office, 1962Description: 22 p. + map. --.Content type: Texto (visual) Media type: sin mediación Subject(s): Montana | Pleistoceno
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