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Articles by author: Rossen Tzonev

https://orcid.org/0000-0001-8112-1354

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Recent changes in the presence status and numbers of ruddy shelduck (Tadorna ferruginea) in the Eastern Balkans
9 April 2020 · vol. 41 · pp. 41–49

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Historia naturalis bulgarica
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National Museum of Natural History, Bulgarian Academy of Sciences