Two new plant genera of Pennsylvanian age from Kansas coal balls.

Bibliographic Details
Main Author:	Mamay, Sergius H., 1920-
Format:	Government Document Book
Language:	English
Published:	Washington : U.S. Govt. Print. Off, 1954.
Series:	Professional paper (Geological Survey (U.S.)) ; 254-D. Shorter contributions to general geology.
Subjects:	Paleobotany > Pennsylvanian. Plant spores, Fossil. Seeds, Fossil. Paleobotany > Kansas.