Ecosystems, energy, population / Jonathan Turk ... [et al.]. Turk, Jonathan. Ecology. Sociology. Human ecology. QH541 .E32 301.31 TUE Supplemented by: Instructor's guide to accompany Ecosystems, energy, population /Jonathan Turk [and others]. (49 p. ; 27 cm.) published : Philadelphia : Saunders, 1975. Call number: QH541.E32 Suppl. Includes bibliographies and index. Philadelphia : Saunders, 1975. 1975. 1975 Text xi, 296 p. : eng Saunders golden series in environmental studies