Copper-nickel mining feasibility study, Duluth Gabbro Area, Minnesota : underground - open stoping with backfill /

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Bibliographic Details
Main Author:	Gignac, Louis P.
Format:	Thesis Book
Language:	English
Published:	1974
Subjects:	Copper mines and mining > Minnesota. Nickel mines and mining > Minnesota. Mines and mineral resources > Minnesota.

Minnesota Department of Natural Resources

Holdings details from Minnesota Department of Natural Resources
Call Number:	ISIL:US-MNN