Não informado. (1974). Key-word-index of Wildlife Research. Swiss Wildlife Information Service.
Chicago-viite (17. p.)Não informado. Key-word-index of Wildlife Research. Zurich, Suíça: Swiss Wildlife Information Service, 1974.
MLA-viite (8. p.)Não informado. Key-word-index of Wildlife Research. Swiss Wildlife Information Service, 1974.
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