Investigation of low-grade and complex ores in Colorado

Author:	Hornor, R. R.
Additional Authors:	Coghill, Will H.
Year:	1921
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:2206
Series:	Report of investigations / United States. Bureau of Mines ;
Report Number:	2206
Subjects:	Ore deposits--Colorado
	Ores--Colorado
	Ores--Sampling and estimation
	Ores
Link:	https://hdl.handle.net/2027/mdp.39015086555383