1973 - The Shell Five Hundred Million Years of Inspired Design (Hardcover) → Paperback, Hardcover ISBN-13: 9780810904842 ISBN-10: 0810904845 Genre: Science & Math ? 1972 - The Shell Five Hundred Million Years of Inspired Design (Other) → Paperback, Hardcover ISBN-13: 9780345026897 ISBN-10: 0345026896 Genre: Science & Math ? 1968 - Seashells of North America a Guide to Field Identification (Paperback) ISBN-13: 9780307136572 ISBN-10: 0307136574 Genre: Outdoors & Nature 3 |