https://www.lexpera.com.tr/resmi-gazete/21-08-1989/20259 monthly 2026-07-16T13:52:14Z https://www.lexpera.com.tr/resmi-gazete/metin/ankara-universitesi-egitim-bilimleri-fakultesi-ogretmenlik-sertifikasi-yonetmeliginde-degisiklik-4 1989-08-21T00:00:00Z