Studies of roof movement in coal mines.

Author: Maize, Earl R.
Additional Authors: Thomas, Edward., Greenwald, H. P.
Year: 1941
Document Type: BMRA
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.23:3562
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 3562
Subjects: Coal mines and mining--Pennsylvania
Mine subsidence
Link: https://hdl.handle.net/2027/mdp.39015078493742

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