Bureau of Mines, Pittsburgh Mining and Safety Research Center research and development activities :fiscal year 1971

Year:	1974
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:8644
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	8644
Subjects:	Explosives
	Mine safety
	Coal mines and mining--Safety measures
Link:	https://hdl.handle.net/2027/mdp.39015078516070