Method of determining the strength of a mine roof

Author: Merrill, Robert H.
Additional Authors: Morgan, Thomas A.
Year: 1958
Document Type: BMRA
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.23:5406
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 5406
Subject: Mine roof control
Link: https://hdl.handle.net/2027/mdp.39015078541805

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