Grounding Electrical Equipment In and About Coal Mines

Author:	Griffith, Franklin E.
Year:	1943
Document Type:	N/A
SUDOC:	I 28.23:3734
Series:	United States Bureau of Mines Reports
Report Number:	R. I. 3734
Subjects:	Coal mines and mining.
	Mines and mineral resources -- Equipment and supplies.
Link:	http://digital.library.unt.edu/ark:/67531/metadc38430/