Ore deposits of the Helena mining region, Montana:
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Bibliographic Details
Main Author: Knopf, Adolph (Author)
Format: Book
Language:English
Published: Washington, DC US Gov. Print. Off. 1913
Series:United States Geological Survey: Geological Survey bulletin 527
Subjects:
Physical Description:143 S. Ill., Kt.

There is no print copy available.

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