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1“... reservoir and the Volga river banks in Samara district is 1018.1 km, the total length of forested banks...”
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2“... territories (fig. 3): the Novgorod district, the middle and lower Volga river, the Don river basin...”
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3“... and covered large territory between the Volga river with Rybinsk, Yaroslavl and Kostroma cities, Onezhskoe...”
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4“...-s and regularly noted on all islands and shallows of the Oka and Volga rivers that time (Puzanov et al., 1955...”
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5by Карякин, И.“... found in pine forest on terraces of the Volga river in 1997, and 3 breeding territories were noted...”
Published 2007
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6“... of the species range crosses the N. Novgorod district approximately on the Volga river. Probably in 1950-70...”
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