Classification of the Pennsylvanian rocks of Illinois as of 1956 /

Bibliographic Details
Main Author:	Wanless, Harold R. (Harold Rollin), 1899-1970
Other Authors:	Siever, Raymond
Format:	Book
Language:	English
Published:	Urbana, [publisher not identified] ; 1956.
Series:	Circular (Illinois State Geological Survey) ; 217.
Subjects:	Rocks > Classification. Petrology > Illinois. Geology, Stratigraphic > Pennsylvanian.

Description
Item Description:	Cover title.
Physical Description:	14 pages : folded table (in pocket) ; 25 cm.
Bibliography:	Bibliography: pages 13-14.