Strategi adaptasi masyarakat petani terhadap ekosistem savana: studi kasus di Kecamatan Amarasi Kabupaten Kupang Propinsi Nusa Tenggara Timur = Strategic adaptation of peasant community in a savanna ecosystem ( A case study of the Sub District of Amarasi District of Kupang, East Nusa Tenggara) - Lewoleba, Gregorius Goran, author (Program Pascasarjana Universitas Indonesia, 1991)