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Message * Problemy Okhrany i Ėkologicheskogo Monitoringa Prirodnykh Landshaftov i Bioraznoobrazii︠a︡ Sbornik Stateĭ Vserossiĭskoĭ Nauchno-Prakticheskoĭ Konferent︠s︡ii, Maĭ 2006 G. - 594338202X - 9785943382024