Американски лешояди (Bulgarian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Американски лешояди" in Bulgarian language version.

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2iucnredlist.org

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Reed, Chester Albert (1914): The bird book. University of Wisconsin. p. 198

books.google.com

Snyder, Noel F. R. & Snyder, Helen (2006). Raptors of North America: Natural History and Conservation. Voyageur Press. ISBN 0-7603-2582-0 p. 40

dmns.org

Wetmore, A. Fossil Birds from the Oligocene of Colorado // Proceedings of the Colorado Museum of Natural History 7 (2). 1927. с. 1 – 14.

doi.org

dx.doi.org

((es)) Stucchi, Marcelo; Emslie Steven D. (2005) „Un Nuevo Cóndor (Ciconiiformes, Vulturidae) del Mioceno Tardío-Plioceno Temprano de la Formación Pisco, Perú.“ The Condor 107:(1) 107 113 DOI:10.1650/7475

iucnredlist.org

apiv3.iucnredlist.org

BirdLife International. Gymnogyps californianus // IUCN Red List of Threatened Species. International Union for Conservation of Nature, 2009a. Посетен на 6 октомври 2009. (на английски)
BirdLife International. Vultur gryphus // IUCN Red List of Threatened Species. International Union for Conservation of Nature, 2009. Посетен на 6 октомври 2009. (на английски)

si.edu

si-pddr.si.edu

Alvarenga, H. M F. & S. L. Olson. (2004). "A new genus of tiny condor from the Pleistocene of Brazil (Aves: Vulturidae) Архив на оригинала от 2012-02-27 в Wayback Machine.." Proceedings of the Biological Society of Washington 117(1) 1 9

uncw.edu

people.uncw.edu

Suárez, W. и др. New fossil material with a redescription of the extinct condor Gymnogyps varonai (Arredondo, 1971) from the Quaternary of Cuba (Aves: Vulturidae) // Proceedings of the Biological Society of Washington 116 (1). 2003. с. 29 – 37.

unm.edu

sora.unm.edu

Emslie, Steven D. An early condor-like vulture from North America (PDF) // The Auk 105 (3). 1988. с. 529 – 535.

web.archive.org

Alvarenga, H. M F. & S. L. Olson. (2004). "A new genus of tiny condor from the Pleistocene of Brazil (Aves: Vulturidae) Архив на оригинала от 2012-02-27 в Wayback Machine.." Proceedings of the Biological Society of Washington 117(1) 1 9