https://www.lexpera.com.tr/resmi-gazete/15-05-1981/17341 monthly 2026-10-13T09:12:36Z https://www.lexpera.com.tr/resmi-gazete/metin/gider-vergisi-genel-tebligi-17341-seri-no-79 1981-05-15T00:00:00Z