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The gold pan as a quantitative geologic tool / by Paul K. Theobald.

By: THEOBALD, Paul K.
Material type: materialTypeLabelBookSeries: Geological Survey Bulletin; 1071-A.Publisher: Washington : United States Government Printing Office, 1957Description: 54 p. --.Content type: Texto (visual) Media type: sin mediación Subject(s): Minerales | Petrología
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