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Message * Rossiĭskai︠a︡ Nauchno-Prakticheskai︠a︡ Konferent︠s︡ii︠a︡ "Optimizat︠s︡ii︠a︡ Prirodopolʹzovanii︠a︡ i Okhrana Okruzhai︠u︡shcheĭ Sredy I︠u︡zhno-Uralʹskogo Regiona", 25-27 Marta 1998 G - 5741003699 - 9785741003695