Paleozoic origin of the cycads /
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| Author / Creator: | Mamay, Sergius H., 1920- author. |
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| Imprint: | Washington : United States Department of the Interior, Geological Survey, 1976. |
| Description: | 1 online resource (iii, 48 pages, 5 unnumbered pages of plates) : illustrations. |
| Language: | English |
| Series: | Geological Survey professional paper ; 934 Geological Survey professional paper ; 934. |
| Subject: | |
| Format: | E-Resource U.S. Federal Government Document Book |
| URL for this record: | http://pi.lib.uchicago.edu/1001/cat/bib/11557389 |