Pennsylvanian tree fern compressions Caulopteris, Megaphyton, and Artisophyton gen. nov. in Illinois /
Hermann W. Pfefferkorn.

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Main Author: Pfefferkorn, Hermann W.
Related Names: Illinois State Geological Survey.
Illinois. Dept. of Registration and Education.
Language(s): English
Published: Urbana : Illinois State Geological Survey, 1976.
Subjects: Bomen (biologie)
Varens.
Paleobotany > Paleobotany / Illinois.
Paleobotany > Paleobotany / Pennsylvanian.
Ferns, Fossil.
Note: At head of title: State of Illinois. Department of Registration and Education.
Cover title.
Physical Description: 31 p. : ill. ; 26 cm.
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Full view Information circular / Illinois State Geological Survey ; [no. 492]	University of Illinois at Urbana-Champaign

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