Townsend, Colin R. Essentials of ecology by Colin R. Townsend, Michael Begon and John L. Harper - 2nd ed. - London Blackwell Publishing c2003 - xiii,530p.:col.ill.; 26cm. Library has 2nd 3rd ed. also ISBN: 9780632043484 Subjects--Topical Terms: Ecology Dewey Class. No.: 574.5 / TOW