Drilling and Dustiness of Metal-Mine Air

Author:	Harrington, D.
Year:	1922
Document Type:	N/A
SUDOC:	I 28.23:2339
Series:	United States Bureau of Mines Reports
Report Number:	R. I. 2339
Subjects:	Mine ventilation.
	Mine dusts.
	Boring.
Link:	https://digital.library.unt.edu/ark:/67531/metadc38372/