https://www.lexpera.com.tr/resmi-gazete/07-10-1989/20305 monthly 2026-07-20T08:13:09Z https://www.lexpera.com.tr/resmi-gazete/metin/yapi-tesis-ve-onarim-ihalelerine-katilma-yonetmeliginde-degisiklik-yapilmasina-dair-yonetmelik-20305 1989-10-07T00:00:00Z