The National Safety Competition of 1929

Author:	Adams, William Waugh
Year:	1930
Document Type:	N/A
SUDOC:	C 22.12:3019
Series:	United States Bureau of Mines Reports
Report Number:	R. I. 3019
Subjects:	Coal mines and mining -- United States.
	Coal mine accidents.
	Mine safety.
Link:	http://digital.library.unt.edu/ark:/67531/metadc38381/