New developments in personal lighting systems for miners

Author:	Lewis, W. H.
Additional Authors:	Ferreira, Elio.
Year:	1983
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:8938
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	8938
Subjects:	Mine lighting--Equipment and supplies
	Nickel-cadmium batteries
	Safety lamps
Link:	https://hdl.handle.net/2027/mdp.39015078455121