Peg-billed finch (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Peg-billed finch" in English language version.

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biodiversitylibrary.org

Ridgway, Robert (1882). "Notes on some Costa Rican birds". Proceedings of the United States National Museum. 4 (235): 333–337 [335–336]. doi:10.5479/si.00963801.235.333.
Paynter, Raymond A. Jr, ed. (1970). Check-List of Birds of the World. Vol. 13. Cambridge, Massachusetts: Museum of Comparative Zoology. p. 111.

BirdLife International (2016). "Acanthidops bairdi". IUCN Red List of Threatened Species. 2016: e.T22723128A94805073. doi:10.2305/IUCN.UK.2016-3.RLTS.T22723128A94805073.en. Retrieved 12 November 2021.
Ridgway, Robert (1882). "Notes on some Costa Rican birds". Proceedings of the United States National Museum. 4 (235): 333–337 [335–336]. doi:10.5479/si.00963801.235.333.

Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2020). "Tanagers and allies". IOC World Bird List Version 10.2. International Ornithologists' Union. Retrieved 5 November 2020.