PENGELOLAAN DAN TINGKAT KESEJAHTERAAN GAJAH SUMATERA (Elephas maximus sumatranus Temminck, 1847) DI FLYING SQUAD WWF TAMAN NASIONAL TESSO NILO RIAU - Tohir, Rizki Kurnia (Deparement of Forest Resources Conservation and Ecotourism - Bogor Agricultural University, 2017)