(1964). Defenders: The magazine of defenders of wildlife. Washington, D C : Defenders of Wildlife.
Chicago-čujuhus (17. p.)Defenders: The Magazine of Defenders of Wildlife. Washington, D C : Defenders of Wildlife, 1964.
MLA-čujuhus (9. p.)Defenders: The Magazine of Defenders of Wildlife. Washington, D C : Defenders of Wildlife, 1964.
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