A new cycadophyte and its relatives
By: by James M. Schopf
Series: Circular / Illinois State Geological Survey -- no. 50; Circular (Illinois State Geological Survey) -- no. 50.
Publisher: State Geological Survey
Published: 1939
Place of publication: Urbana, Ill
Language: eng
Number of pages: 109
Subjects: Fossil Cycads; Fossil Plants
Notes: Cover title.

"Reprinted from the Transactions, Illinois State Academy of Science, vol. 31, no. 2, pp. 107-109, 1939."

Includes bibliographical references (p. 109).