Smith, Robert Leo Elements of ecology / Robert Leo Smith, Thomas M. Smith. - 5th ed. - San Francisco, Calif : Benjamin Cummings, c2003. - xvi, 682 pages : color illustrations ; 27 cm Glossary : p. 645 - 660. Includes bibliographical references and index. ISBN: 080534473x Subjects--Topical Terms: Ecology. LC Class. No.: QH541 / Sm6 2003