Shrinkage stoping

Author: Jackson, Charles Freeman,
Year: 1930
Document Type: MAIN
Issuing Agency: U.S. Dept. of Commerce, Bureau of Mines,
SUDOC: C 22.11:6293
Series: Information Circular ;
Report Number: 6293
Subject: Mining engineering
Link: https://hdl.handle.net/2027/mdp.39015095083765

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