State regulations governing explosion-proof type electric motors in coal mines

Author:	Ilsley, L. C.
Year:	1929
Document Type:	MAIN
SUDOC:	C 22.11:6096
Series:	Information circular / Bureau of Mines ;
Report Number:	6096
Subjects:	Coal mines and mining--Safety measures
	Electricity in mining
Link:	https://hdl.handle.net/2027/mdp.39015095078286