Vol 457 | 5 February 2009 | doi:nature07673 LETTERS Fossil steroids record the appearance of Demospongiae during the Cryogenian period Gordon D. Love1,2, Emmanuelle Grosjean3, Charlotte Stalvies4, David A. Fike5 - Hexactinellid - Document - PDFSEARCH.IO

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Date: 2010-10-07 18:20:31		Vol 457 \| 5 February 2009 \| doi:nature07673 LETTERS Fossil steroids record the appearance of Demospongiae during the Cryogenian period Gordon D. Love1,2, Emmanuelle Grosjean3, Charlotte Stalvies4, David A. Fike5 Add to Reading List Source URL: earthsciences.ucr.edu Download Document from Source Website File Size: 355,97 KB Share Document on Facebook