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Message * Problemy Okhrany i Rat︠s︡ionalʹnogo Ispolʹzovanii︠a︡ Prirodnykh Resursov Severnogo Kavkaza Tezisy Dokladov 5-Ĭ Severo-Kavkazskoĭ Regionalʹnoĭ Mezhvuzovskoĭ Studencheskoĭ Konferent︠s︡ii, Noi︠a︡brʹ 1992 G. - 5230154829 - 9785230154822