https://www.lexpera.com.tr/resmi-gazete/23-07-1981/17409 monthly 2026-07-14T13:11:19Z https://www.lexpera.com.tr/resmi-gazete/metin/devlet-opera-ve-balesi-genel-mudurlugu-alim-satim-ve-ihale-isleri-ile-muhasebe-isleri-ve-ayniyat-4 1981-07-23T00:00:00Z