Eospermatopteris: References & Edit History
Article Contributors
Primary Contributors
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Nan Crystal Arens
Professor of Geoscience, Hobart and William Smith Colleges, Geneva, New York.
Other Encyclopedia Britannica Contributors
Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Revised geological time boundaries. | Sep 21, 2021 | ||
| New article added. | Jul 16, 2010 |
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