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...rdLife International | title = ''Cygnus olor'' | journal = [[IUCN Red List of Threatened Species]] | volume= 2012 | page = e.T22679839A40128183 | publish
...987 |title=Wildfowl: An Identification Guide to the Ducks, Geese and Swans of the World |publisher=A & C Black |isbn=0-7470-2201-1}}</ref> Measuring {{co
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| image = The book of antelopes (1894) Saiga tatarica.png
| range_map_caption = Reconstructed range (white) and current distribution of the two subspecies ''Saiga tatarica tatarica'' (green) and ''S. t. mongolic
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| authority = [[Carl Linnaeus|Linnaeus]], [[10th edition of Systema Naturae|1758]]
...cally endangered</ref> Their name comes from the ancient historical region of [[Bactria]].<ref name="netindustries">{{cite web|url=http://science.jrank.o
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| trinomial_authority = ([[Carl Linnaeus|Linnaeus]], [[10th edition of Systema Naturae|1758]])
...-European and the Indo-Europeans: A Reconstruction and Historical Analysis of a Proto-Language and Proto-Culture'', Walter de Gruyter, pp. 413-417, ISBN
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