https://www.lexpera.com.tr/resmi-gazete/26-02-1981/17263 monthly 2026-07-21T23:21:40Z https://www.lexpera.com.tr/resmi-gazete/metin/ogretmeni-yetistirme-merkezi-disiplin-yonetmeligi-17263 1981-02-26T00:00:00Z