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PRESIDEN REPUBLIK INDONESIA KEPUTUSAN PRESIDEN REPUBLIK INDONESIA NOMOR 23 TAHUN 1992 TENTANG PENGESAHAN VIENNA CONVENTION FOR THE PROTECTION OF THE OZONE LAYER DAN MONTREAL PROTOCOL ON SUBSTANCES THAT DEPLETE THE OZONE LAYER AS ADJUSTED AND AMANDED BY THE SECOND MEETING OF THE PARTIES LONDON, 27-29 JUNE 1990