The Niagaran reef at Thornton, Illinois
Subtitle: guidebook for the field conference held in connection with the annual convention of the American Association of Petroleum Geologists and the Society of Economic Paleontologists and Mineralogists at Chicago, Illinois, April 22, 1956
By: Guidebook prepared by Heinz A. Lowenstam, H. B. Willman, and David H. Swann
Contributors: Willman, H. B. (Harold Bowen), 1901-; Swann, David H.; American Association of Petroleum Geologists; Society of Economic Paleontologists and Mineralogists; Illinois State Geological Survey
Series: Guidebook -- 4; Guidebook series (Illinois State Geological Survey) -- no. 4.
Publisher: Illinois State Geological Survey
Published: 1956
Place of publication: Urbana
Language: eng
Number of pages: 19
Subjects: Reefs; Stratigraphic Geology; Geology
Notes: "Field Conference sponsored by Illinois State Geological Survey"

Bibliography: leaf 3.