Ames, P. L. The morphology of the syrinx in passerine birds. Yale University. Peabody Museum of Natural History.
Chicago-referens (17:e uppl.)Ames, Peter L. The Morphology of the Syrinx in Passerine Birds. New Haven: Yale University. Peabody Museum of Natural History.
MLA-referens (9:e uppl.)Ames, Peter L. The Morphology of the Syrinx in Passerine Birds. Yale University. Peabody Museum of Natural History.
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