Electrical accidents in bituminous-coal mines :coal-mine accident-prevention course.

Year:	1947
Document Type:	MAIN
Issuing Agency:	U.S. Govt. Print. Off.,
Series:	Miners' circular ;
Report Number:	59
Subjects:	Coal mine accidents--United States--Prevention
	Electrical injuries--United States--Prevention
Link:	https://hdl.handle.net/2027/mdp.39015077562570