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Ribeiro, J., Torres, R.A., Adam, M.L. and Cornélio, D.A. 2003.

Cytotaxonomic diagnoses of two Neotropical swift species: Streptoprocne biscutata and Streptoprocne zonaris (Aves: Apodidae)

. Zootaxa. 224, 1 (Jun. 2003), 1–7. DOI:https://doi.org/10.11646/zootaxa.224.1.1.