Mining Methods and Costs, Black Rock Tungsten Mine, Wah Chang Mining Corp., Mono County, California

Author:	Johnson, A. C.
Year:	1960
Document Type:	N/A
SUDOC:	I 28.27:7945
Series:	Information circular (United States. Bureau of Mines)
Report Number:	I. C. 7945
Subjects:	Mining engineering.
	Mineral industries -- California.
Link:	https://digital.library.unt.edu/ark:/67531/metadc170717/