Estimasi Potensi dan Kinerja Sapi Bali di Kabupaten Timor Tengah Utara, Propinsi Nusa Tenggara Timur (The Potency Estimation and Performance of Bali Cattle in Timor Tengah Utara Regency, East Nusa Tenggara Province) - Tonbesi, Trimeldus Tulak (Faculty of Animal Science, Universitas Gadjah Mada, 2012)