http://www.tarlasera.com/haber-11062-turkiye%E2%80%99de-biyolojik-mucadelenin-ilk-yillari
U UÖZKAN.77 16.12.2016 #1 http://www.tarlasera.com/haber-11062-turkiye’de-biyolojik-mucadelenin-ilk-yillari