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Message * Monitorninga Okruzhai︠u︡shcheĭ Prirodnoĭ Sredy Trudy Ii Konferent︠s︡ii Molodykh Uchenykh Laboratorii Monitoringa Prirodnoĭ Sredy i Klimata, Moskva, 24 Marta 1987 G. - 5286004008 - 9785286004003