Harrisburg area
Subtitle: Harrisburg and Brownfield Quadrangles
By: by Gilbert O. Raasch
Contributors: Illinois State Geological Survey
Series: Guide leaflet -- 51-A; Guide leaflet (Illinois State Geological Survey) -- 51-A.
Publisher: State of Illinois, Dept. of Registration and Education, State Geological Survey Division
Published: 1951
Place of publication: Urbana, Ill
Language: eng
Number of pages: 13
Subjects: Geology
Other titles: Harrisburg and Brownfield Quadrangles.
Notes: Cover title.

"April 7, 1951."

Includes bibliographical references (p. 13).