Coal-mine fatalities in the United States, 1920 :and coal-mine statistics supplementing those published in Bulletin 115, and a list of permissible explosives, lamps, and motors tested prior to January 31, 1921

Author:	Adams, W. W.
Year:	1921
Document Type:	USBM
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.7:288
Series:	Technical paper / United States Department of the Interior, Bureau of Mines ;
Report Number:	288
Subjects:	Electric motors--Testing
	Coal mine accidents--United States
	Electric lamps
	Explosives--Testing
Link:	https://hdl.handle.net/2027/mdp.39015077568031