Stratigraphy of Middle Ordovician rocks in the zinc-lead district of Wisconsin, Illinois, and Iowa
By: by Allen F. Agnew ... [et al.].
Contributors: Agnew, Allen Francis, 1918-; Wisconsin Geological and Natural History Survey.
Series: Geological Survey professional paper -- 274-K; Shorter contribution to general geology; Shorter contributions to general geology
Publisher: U.S. G.P.O.
Published: 1956
Place of publication: Washington
Language: eng
Number of pages: 312
Subjects: Geology -- Wisconsin; Geology -- Illinois; Geology -- Iowa; Geology, Stratigraphic -- Ordovician.
Notes: "Prepared in cooperation with the Wisconsin Geological and Natural History Survey."

Includes bibliographical references and index.