Allen, Shirley Walter,
Conserving natural resources; principles and practice in a democracy Shirley Walter Allen and Justin Wilkinson Leonard. - 3d ed. - New York, McGraw-Hill c1966. - vii, 432 p. illus., maps. 23 cm.
Includes bibliographical references.
English
65028230
Conservation of natural resources--United States.
HC103.7 / .A7 1966
333.72/ALC
Conserving natural resources; principles and practice in a democracy Shirley Walter Allen and Justin Wilkinson Leonard. - 3d ed. - New York, McGraw-Hill c1966. - vii, 432 p. illus., maps. 23 cm.
Includes bibliographical references.
English
65028230
Conservation of natural resources--United States.
HC103.7 / .A7 1966
333.72/ALC