Specimens of extinct and threatened birds in the collections of the National Museum of Natural History in Sofia, Bulgaria
Boev, Zlatozar, 1955-
Article
2003
Bulletin of the British Ornithologists' Club
123A
234--245
BioStor
English
London, British Ornithologists' Club, 1893-
BioStor: https://biostor.org/reference/127673
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http://creativecommons.org/licenses/by-nc-sa/3.0/
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