Methods and costs of sinking a shaft through a fractured, water-bearing formation at Friedensville, Pa.

Author:	Hastings, Warren.
Additional Authors:	Wright, Fred D., Kane, F. J.
Year:	1954
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7680
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	7680
Subjects:	Shaft sinking--Costs
	Shaft sinking
	Zinc ores--Pennsylvania--Lehigh County
	Prospecting--Pennsylvania--Lehigh County
Link:	https://hdl.handle.net/2027/mdp.39015078460246