Shaft-sinking methods, practices, and costs of the Consolidation Coal Co. at its no. 261 mine, Caretta, McDowell County, W. Va.

Author:	Kelley, Laurence E.
Year:	1932
Document Type:	USBI
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6602
Series:	Information circular / Bureau of Mines ;
Report Number:	6602
Subjects:	Shaft sinking--Technique
	Shaft sinking--Costs
	Mining engineering
Link:	https://hdl.handle.net/2027/mdp.39015086485342