https://www.lexpera.com.tr/resmi-gazete/09-06-1987/19482 monthly 2026-10-09T14:54:39Z https://www.lexpera.com.tr/resmi-gazete/metin/doner-sermayeli-kuruluslar-ihale-yonetmeligi-degisikligi-19482-87-11672 1987-06-09T00:00:00Z