Peterson, AT and Navarro-Siguenza, AG, (2000) A new taxon in the Amazilia viridifrons (Chordata : Aves : Trochilidae) complex of southern Mexico, Proceedings of the Biological Society of Washington, Volume: 113, Issue: 4, Pages: 864-870, Published: dec 29 2000, ISSN: 0006-324X
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