Alexander Wetmore et al.: Twenty-second supplement to the American Ornithologists' Union checklist of North American birds. In: Auk. Band64, Nr.3, 1947, S.445–452 [451], doi:10.2307/4080390, JSTOR:4080390 (unm.edu [PDF]).
Alexander Wetmore et al.: Twenty-second supplement to the American Ornithologists' Union checklist of North American birds. In: Auk. Band64, Nr.3, 1947, S.445–452 [451], doi:10.2307/4080390, JSTOR:4080390 (unm.edu [PDF]).
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Alexander Wetmore et al.: Twenty-second supplement to the American Ornithologists' Union checklist of North American birds. In: Auk. Band64, Nr.3, 1947, S.445–452 [451], doi:10.2307/4080390, JSTOR:4080390 (unm.edu [PDF]).