Estimating Water Footprint of Palm Oil Production in PTP Mitra Ogan Baturaja, South Sumatera - Kospa, Herda Sabriyah Dara; Universitas Indo Global Mandiri, Jenderal Sudirman Street, KM. 4 No. 629, Palembang 30129 (International Journal on Advanced Science, Engineering and Information Technology, 2017)