Sinking practice and costs at the Pim Shaft, St. Louis Smelting & Refining Works, National Lead Co., St. Francois, Mo.

Author:	Poston, Roy H.
Year:	1932
Document Type:	MAIN
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6588
Series:	Information circular / Bureau of Mines ;
Report Number:	6588
Subjects:	Mines and mineral resources--Missouri
	Mining engineering--Missouri
	Mineral industries--Missouri
Link:	https://hdl.handle.net/2027/mdp.39015095085612