https://www.lexpera.com.tr/resmi-gazete/30-01-1990/20418 monthly 2026-07-21T23:21:40Z https://www.lexpera.com.tr/resmi-gazete/metin/mecburi-standard-89-87-88-tebligi-20418-89-87-88 1990-01-30T00:00:00Z