seed fern: References & Edit History
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Article Contributors
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Nan Crystal Arens
Professor of Geoscience, Hobart and William Smith Colleges, Geneva, New York.
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Add new Web site: University of Kansas - Division of Paleobotany - Current Concepts of Paleozoic Seed Ferns. | Apr 17, 2016 | ||
| Media added. | Sep 07, 2010 | ||
| Added new Web site: Michigan State University - Carboniferous Seed Ferns. | Oct 15, 2008 | ||
| Article revised and updated. | Jul 16, 2008 | ||
| Article added to new online database. | Jul 20, 1998 |
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