https://www.lexpera.com.tr/resmi-gazete/23-12-1990/20734 monthly 2026-07-22T06:30:33Z https://www.lexpera.com.tr/resmi-gazete/metin/basbakanlik-ozel-cevre-koruma-kurumu-baskanligi-yayin-yonetmeligi-20734-1 1990-12-23T00:00:00Z