Taxonomic revision of the Spermatopsida of the Oligocene Creede flora, southern Colorado /
Wolfe, Jack A.,1936-
Schorn, Howard E.
[Reston, Va.?] : Dept. of the Interior, U.S. Geological Survey ; Denver, CO : For sale by the Books and Open-File Reports Section,
1990.
Shipping list no.: 91-118-P.
Includes bibliographical references (p. 38-40).
Paleobotany
Paleobotany