Exploratory drilling in the Prairie du Chien group of the Wisconsin zinc-lead district by the U.S. Geological Survey in 1949-1950
By: by Allen V. Heyl, Jr., Erwin J. Lyons, and Allen F. Agnew. Prepared in cooperation with the Wisconsin Geological and Natural History Survey
Series: Geological Survey circular 131; Geological Survey circular -- 131.
Published: 1951
Place of publication: [Washington]
Language: eng
Number of pages: 35
Subjects: Lead ores; Zinc ores; Borings
Notes: "Selected bibliography": p. 16.