Stratigraphy of Middle Ordovician rocks in the zinc-lead district of Wisconsin, Illinois, and Iowa /

Bibliographic Details
Main Author:	Agnew, Allen F., 1918-2012
Format:	Government Document Book
Language:	English
Published:	Washington : U.S. Govt. Print. Off, 1956.
Series:	Professional paper (Geological Survey (U.S.)) ; 274-K. Shorter contributions to general geology.
Subjects:	Geology, Stratigraphic > Ordovician. Geology > Wisconsin. Geology > Illinois. Geology > Iowa.

by Agnew, Allen F., 1918-2012
Published 1956

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