Two new lycopod seeds from the Illinois Pennsylvanian
By: by James M. Schopf
Contributors: Illinois State Geological Survey
Series: Circular -- no. 28; Circular (Illinois State Geological Survey) -- 28.
Publisher: Illinois State Geological Survey
Published: 1938
Place of publication: Urbana, Ill
Language: eng
Number of pages: 146
Notes: Cover title.

"Reprinted from the Transactions, Illinois State Academy of Science, vol. 30, no. 2, pp. 139-146, 1938."

Includes bibliographical references (p. 146).