Morton, John Edward. Molluscs / J. E. Morton. - 4th (revised) ed. - London : Hutchinson, 1967. - 244 p. : illus. ; 22 cm. - Hutchinson university library: Biological sciences . Bibliography: p. [226]-235. Subjects--Topical Terms: Mollusks. Dewey Class. No.: 594 / MOM 1967