South American great horned owl (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "South American great horned owl" in English language version.

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bsc-eoc.org

avibase.bsc-eoc.org

"Great Horned Owl (Venezuelan) (Bubo virginianus nacurutu) (Vieillot, 1817)". AviBase. Retrieved 22 November 2019.

cornell.edu

bna.birds.cornell.edu

Houston, C. S.; Smith, D. G.; Rohner, C. (1998). Great Horned Owl (Bubo virginianus). In: Poole, A.; Gill, F. (eds.): Birds of North America 372. Academy of Natural Sciences, Philadelphia, PA & American Ornithologists' Union, Washington, D.C. Online version, retrieved 2006-12-05. (HTML preview)

doi.org

Melvin A. Traylor (1958). "Variation in South American Great Horned Owls". Auk. 75 (2): 143–149. doi:10.2307/4081883. JSTOR 4081883.

jstor.org

Melvin A. Traylor (1958). "Variation in South American Great Horned Owls". Auk. 75 (2): 143–149. doi:10.2307/4081883. JSTOR 4081883.

unm.edu

sora.unm.edu

Melvin A. Traylor (1958). "Variation in South American Great Horned Owls". Auk. 75 (2): 143–149. doi:10.2307/4081883. JSTOR 4081883.