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Message * Kachestvo Distant︠s︡ionnogo Obrazovanii︠a︡ Kont︠s︡ept︠s︡ii, Problemy, Reshenii︠a︡ : Sbornik Trudov Mezhdunarodnoĭ Nauchno-Prakticheskoĭ Konferent︠s︡ii, 8 Dekabri︠a︡ 2003 G. - 5276005486 - 9785276005485