Poulsen, H. (1953). A study of incubation responses and some other behaviour patterns in birds. B. Lunos.
Citace podle Chicago (17th ed.)Poulsen, Holger. A Study of Incubation Responses and Some Other Behaviour Patterns in Birds. København: B. Lunos, 1953.
Citace podle MLA (8th ed.)Poulsen, Holger. A Study of Incubation Responses and Some Other Behaviour Patterns in Birds. B. Lunos, 1953.
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