I. Subsurface relations of the Maquoketa and "Trenton" formations in Illinois /

Bibliographic Details
Main Author:	Du Bois, Ernest Paul, 1917-
Other Authors:	Bays, Carl Andrew, 1914-
Format:	Book
Language:	English
Published:	Urbana, Illinois, [publisher not identified] ; 1945.
Series:	Report of investigations (Illinois State Geological Survey) ; no. 105.
Subjects:	Geology > Illinois. Petroleum > Geology > Illinois. Geology, Stratigraphic > Ordovician.

Description
Item Description:	At head of title: State of Illinois. Dept. of Registration and Education. Division of the State Geological Survey.
Physical Description:	38 pages : illustrations
Bibliography:	Bibliographical footnotes.