Stix, Hugh Shell five hundred million years of inspired design Hugh Stix, Marguerite Stix and R. Tucker Abbott; illustrated by H. Landshoff - New York Harry N. Abrams Publishers n.d. - Unpaginated ill. 28cm Includes bibliographical references and index Subjects--Topical Terms: Shells in art; Shells- Pictorial works; Art Dewey Class. No.: 594.3 / STI