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Message * Geoėkologii︠a︡ V Uralo-Kaspiĭskom Regione Tezisy Dokladov Mezhdunarodnoĭ Nauchno-Prakticheskoĭ Konferent︠s︡ii, Ufa, Senti︠a︡brʹ 1996 - 574770110X - 9785747701106