The mine map repository - a source of mine map data.

Author: Edgerton, Curtis D.
Year: 1974
Document Type: USBI
Issuing Agency: U.S. Bureau of Mines
SUDOC: I 28.27:8657
Series: Information circular 8657
Subject: Mine maps
Link: https://hdl.handle.net/2027/mdp.39015078463075

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