Standardization of electrical practice in mines

Year:	1910
Document Type:	NBRA
Issuing Agency:	Govt. print. off.,
SUDOC:	C 13.4:23
Series:	National Bureau of Standards circular ;
Report Number:	no. 23
Subjects:	Electricity in mining
	Mining law
Links:	https://hdl.handle.net/2027/mdp.39015077292046
	https://hdl.handle.net/2027/uiug.30112106920454