Churn drilling at the McGregor zinc-lead mine, Washington County, Mo.

Author:	McMillan, W. D.
Year:	1948
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:4308
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	4308
Subjects:	Lead mines and mining--Missouri--Washington County
	Zinc mines and mining--Missouri--Washington County
	Boring--Missouri--Washington County
	Mine examination--Missouri--Washington County
Link:	https://hdl.handle.net/2027/mdp.39015078466813