https://www.lexpera.com.tr/resmi-gazete/27-05-1992/21240 monthly 2026-07-17T04:48:11Z https://www.lexpera.com.tr/resmi-gazete/metin/okul-defterleri-ts-4544-standardi-hakkinda-teblig-sayi-92-7-8-21240 1992-05-27T00:00:00Z