Invertebrates / Richard C. Brusca, Gary J. Brusca ; with illustrations by Nancy J. Haver. Brusca, Richard C. Brusca, Gary J. Invertebrates. QL362 .B924 1990 592 20 BRI Includes bibliographical references and index. Sunderland, Mass. : Sinauer Associates, c1990. c1990. 1990 Text xviii, 922 p. : eng