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Message * Ėkologii︠a︡, Zdorovʹe i Prirodopolʹzovanie Rossiĭskai︠a︡ Nauchno-Prakticheskai︠a︡ Konferent︠s︡ii︠a︡, Posvi︠a︡shchennai︠a︡ 200-Letii︠u︡ Saratovskoĭ Gubernii, Saratov, 10-11 Senti︠a︡bri︠a︡ 1997 G. : Tezisy Dokladov - 570110186X - 9785701101867