Cover Image

The Middle Devonian strata of southern Illinois /

Bibliographic Details
Main Author: North, William G.
Format: Book
Language:English
Published: Urbana : Illinois State Geological Survey, 1969.
Series:Circular (Illinois State Geological Survey) ; 441.
Subjects:
Geology, Stratigraphic > Devonian.
Geology > Illinois.
Description
Item Description:Cover title.
Physical Description:45 pages : illustrations, maps.
Bibliography:Bibliography: pages 39-40.