https://www.lexpera.com.tr/resmi-gazete/20-07-1992/21290 monthly 2026-10-09T14:54:39Z https://www.lexpera.com.tr/resmi-gazete/metin/mecburi-standard-92-88-89-sayili-teblig-21290 1992-07-20T00:00:00Z