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Message * Problemy Prirodopolʹzovanii︠a︡ i Ėkologicheskai︠a︡ Situat︠s︡ii︠a︡ V Evropeĭskoĭ Rossii i Sopredelʹnykh Stranakh Materialy Ii Mezhdunarodnoĭ Nauchnoĭ Konferent︠s︡ii, Belgorod, 12-15 Okti︠a︡bri︠a︡ 2006 G. - 5957102350 - 9785957102359