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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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