Electric cap lamps in Alabama mines, 1935

Author:	Cash, Frank E.
Year:	1935
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:6865
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	6865
Subjects:	Safety lamps--Alabama
	Electric lamps--Alabama
	Coal mines and mining--Safety measures
Link:	https://hdl.handle.net/2027/mdp.39015077568718