Some runaway car trips on inclines at coal mines

Author:	Forbes, John Joseph Vincent.
Additional Authors:	Bernewitz, Max Wilhelm von,
Year:	1931
Document Type:	MAIN
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6436
Series:	Information circular / Bureau of Mines ;
Report Number:	6436
Subjects:	Mine safety--Equipment and supplies
	Mine rescue work
Link:	https://hdl.handle.net/2027/mdp.39015095085844