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Message * Ėkonomika Povolzhʹi︠a︡ Materialy Shestoĭ Vserossiĭskoĭ Nauchnoĭ-Tekhnicheskoĭ Konferent︠s︡ii, 19 Apreli︠a︡ 2007 G. - 5473002854 - 9785473002850