Pemanfaatan sumber daya alam potensial di situs kepurbakalaan ratu boko kabupaten Sleman Yogyakarta = Utilization of potential natural resources in archaeological site of ratu boko Sleman district Yogyakarta / Elsan Muhammad - Elsan Muhammad, author (Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2014)