Suggestions for inspection of roof-bolt installations

Author: Thomas, Edward,
Year: 1951
Document Type: USBI
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.27:7621
Series: Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number: 7621
Subject: Mine roof bolting--Inspection
Link: https://hdl.handle.net/2027/mdp.39015078456004

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