Townsend, Colin R. Essentials of ecology / Colin R. Townsend, Michael Begon, John L. Harper. - 3rd ed. - Malden, MA : Blackwell Pub., 2008. - xii, 510 p. : col. ill., col. maps ; 25 cm Includes bibliographical references and index. ISBN: 9781405156585 (pbk. : alk. paper) LCCN: 2007034694 Subjects--Topical Terms: Ecology. LC Class. No.: QH541 / .T66 2008 Dewey Class. No.: 577