An unusually large Aulocopella winnipegensis and associated demosponges from the Upper Ordovician Beaverfoot Formation, southeastern British Columbia

Author: Rigby J K.   Johnston Paul A  

Publisher: NRC Research Press

ISSN: 1480-3313

Source: Canadian Journal of Earth Sciences, Vol.41, Iss.8, 2004-08, pp. : 939-947

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