https://www.lexpera.com.tr/resmi-gazete/03-04-1975/15197 monthly 2026-07-14T13:11:19Z https://www.lexpera.com.tr/resmi-gazete/metin/ormancilik-arastirma-enstitusu-gorev-ve-calismalarina-ait-yonetmelik-15197 1975-04-03T00:00:00Z