Nokipäätangara (Finnish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Nokipäätangara" in Finnish language version.

refsWebsite

Global rank Finnish rank

5,881^st place

32^nd place

88^th place

7^th place

google.fi

Robert S. Ridgely, Guy Tudor, William L. Brown: The Birds of South America: The oscine passerines, s. 283–284. University of Texas Press, 1989. ISBN 978-0-292-70756-6 Kirja Googlen teoshaussa (viitattu 11.10.2020). (englanniksi)
Steven L. Hilty: Birds of Venezuela, s. 746. Princeton University Press, 2003. ISBN 978-0691092508 Kirja Googlen teoshaussa (viitattu 11.10.2020). (englanniksi)

BirdLife International: Pseudospingus verticalis IUCN Red List of Threatened Species. Version 2020-2. 2018. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 11.10.2020. (englanniksi)