Hazard of igniting coal by electric circuits in mines

Author:	Freeman, Howard Bassett,
Year:	1936
Document Type:	USBM
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.7:568
Series:	Technical paper / United States Department of the Interior, Bureau of Mines ;
Report Number:	568
Subjects:	Coal mines and mining
	Coal mines and mining--Safety measures
	Electricity in mining
Link:	https://hdl.handle.net/2027/mdp.39015077565565