Underground coal mine lighting handbook, (in two parts).

Author:	Lewis, W. H.
Year:	1986
Document Type:	USBI
Issuing Agency:	Bureau of Mines,
Series:	Information circular / Bureau of Mines ;
Report Number:	9073
Subjects:	Coal mines and mining
	Mine lighting
Link:	https://hdl.handle.net/2027/mdp.39015078470328