Sealing a coal-mine passageway through a borehole :a progress report

Author: Nagy, John.
Additional Authors: Mitchell, Donald W., Murphy, Edwin M.
Year: 1964
Document Type: BMRA
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.23:6453
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 6453
Subject: Coal mines and mining
Link: https://hdl.handle.net/2027/mdp.39015078519736

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