PURCHON, R.D. The biology of the mollusca /by R.D.Purchon - 2nd ed. - Oxford Pergamon press 1978 - xxv, 560 p.- - International series of monographs in pure and applied biolo . Includes appendix & index. ISBN: 80210287 Subjects--Topical Terms: Mollusca Dewey Class. No.: 594 / PUR