Allen, S. W. (1955). Conserving natural resources: Principles and practice in a democracy. McGraw-Hill.
Citace podle Chicago (17th ed.)Allen, Shirley Walter. Conserving Natural Resources: Principles and Practice in a Democracy. New York: McGraw-Hill, 1955.
Citace podle MLA (8th ed.)Allen, Shirley Walter. Conserving Natural Resources: Principles and Practice in a Democracy. McGraw-Hill, 1955.
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