Sphenopteris sellardsii, a problematical pteridosperm from the Permian of Kansas

https://kuscholarworks.ku.edu/handle/1808/3671
Title: Sphenopteris sellardsii, a problematical pteridosperm from the Permian of Kansas
Author(s):
Robert W. Baxter
Paleo Publication Type:
KU Paleontological Contributions
Publication Format:
Journal article
Year of publication:
1978