Shaft sinking at the Sevier Valley Coal Co. mine

Author:	Tomlinson, Herbert.
Year:	1930
Document Type:	USBI
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6378
Series:	Information circular / United States Department of Commerce, Bureau of Mines ;
Report Number:	6378
Subjects:	Coal mines and mining
	Shaft sinking--Costs
	Shaft sinking--Technique
Link:	https://hdl.handle.net/2027/mdp.39015077576182