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Message * Problemy Khimii i Khimicheskoĭ Tekhnologii T︠s︡entralʹno-Chernozemnogo Regiona Rossiĭskoĭ Federat︠s︡ii Sbornik Dokladov : 5-I︠a︡ Regionalʹnai︠a︡ Nauchno-Tekhnicheskai︠a︡ Konferent︠s︡ii︠a︡, 24-25 Dekabri︠a︡ 1997 G. - 5900037029 - 9785900037028