Conserving natural resources : principles and practice in a democracy /
Allen, Shirley Walter, 1883-
Conserving natural resources : principles and practice in a democracy / by Shirley Walter Allen and Justin Wilkinson Leonard - 3rd ed. - New York : McGraw-Hill, 1966 - vii, 432 p. : illus., maps. ; 23 cm.
Includes bibliographical references
65-028230
Conservation of natural resources--United States
Conserving natural resources : principles and practice in a democracy / by Shirley Walter Allen and Justin Wilkinson Leonard - 3rd ed. - New York : McGraw-Hill, 1966 - vii, 432 p. : illus., maps. ; 23 cm.
Includes bibliographical references
65-028230
Conservation of natural resources--United States