Švažas, Saulius
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Wildfowl 46 - Standard Papers
Steller's Eiders Polysticta stelleri wintering in Europe: numbers, distribution and origin
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2019: Wildfowl Special Issue No. 5 - Standard Papers
Long-term population trends and shifts in distribution of Bewick’s Swans Cygnus columbianus bewickii wintering in northwest Europe
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