Field performance of permissible electric cap lamps

Author:	Hooker, A. B..
Year:	1942
Document Type:	USBI
Issuing Agency:	U.S. G.P.O.,
SUDOC:	I 28.27:7188
Series:	Information circular / Bureau of Mines ;
Report Number:	7188.
Subjects:	Safety lamps
	Electric lamps, Portable
Link:	https://hdl.handle.net/2027/mdp.39015078535617