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M. Alan Kazlev. “mollusks: Bivalvia” 1998-2002,. (online) at <http://www.palaeos.com/Invertebrates/Molluscs/Bivalvia/Bivalvia.html>
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Helena Curtis and N. Sue. “Phylum Mollusca: Mollusks”. Biology, Fifth Edition. (online) at http://infusion.allconet.org/webquest/PhylumMollusca.html
BOOKS
William H.Nault, “The World book of Encyclopedia of Science:The Animal World”. World Book, Inc. Chicago, Illinois.1997.
Grolier Incorporated, “Encyclopedia Americana”. Printed and manufactured in Usa Copyright 2001.
The McGraw Hill Companies, Inc. “Biology: The Biology of Life”. Columbus, Ohio.2004
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