Fossil steroids record the appearance of Demospongiae during the Cryogenian period
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| Description | scientific article |
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author: John P. Grotzinger Daniel J. Condon David A. Fike Will Meredith Alexander S. Bradley Samuel A. Bowring |
| Publication date | February 5, 2009 |
| Language | English |
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| Missing/wrong data? | Edit Wikidata item |