Recommended standards for alternating current in coal mines

Year:	1960
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7962
Series:	Information Circular / Bureau of Mines ;
Report Number:	7962
Subjects:	Coal mines and mining--Electric equipment
	Electricity in mining
Link:	https://hdl.handle.net/2027/mdp.39015077564097