Ore deposits of the Helena mining region, Montana / by Adolph Knopf.

By: Material type: TextTextSeries: United States. Bulletin ; 527.Publication details: Washington, Govt. Print. Off., 1913.Description: 143 p. : ill., plates, fold. maps, diagrs. ; 24 cmSubject(s): LOC classification:
  • TN24.M9 K5
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Some of the plates printed on both sides of leaf.

"Literature": p. 18-19.

Includes index.

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