Purchon, R. D. The biology of the Mollusca / by R. D. Purchon. - 2d ed. - Oxford ; New York : Pergamon Press, 1977. - xxv, 560 p. : ill. ; 24 cm. - International series in pure and applied biology : Division, zoology ; v. 57 . ISBN: 0080210287 LCCN: 76010804 Subjects--Topical Terms: Mollusks. LC Class. No.: QL403 / .P8 1977 Dewey Class. No.: 594