Paleozoic origin of the cycads
Title:
Paleozoic origin of the cycads
Author:
Mamay, Sergius H., 1920-
Personal Author:
Publication Information:
Washington : U.S. Govt. Print. Off., 1976.
Physical Description:
iii, 48 pages, 5 leaves of plates : illustrations ; 29 cm.
General Note:
Includes index.
Language:
English
Format :
Book