State mining laws on the use of electricity in and about coal mines

Author:	Ilsley, L. C.
Year:	1920
Document Type:	USBM
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.7:271
Series:	Technical paper / United States Department of the Interior, Bureau of Mines ;
Report Number:	271
Subjects:	Coal mines and mining--Safety measures
	Electricity in mining
Link:	https://hdl.handle.net/2027/mdp.39015077560608