Hazard of firing open, unconfined shots in coal mines

Author: Ankeny, M. J.
Year: 1952
Document Type: USBI
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.27:7632
Series: Information circular / United States. Bureau of Mines ;
Report Number: 7632
Subjects: Coal mines and mining
Mine explosions
Link: https://hdl.handle.net/2027/mdp.39015078455915

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