Adjat Sudradjat,
Faculty of Geology, Padjadjaran University
Jln. Raya Bandung Sumedang Km 21, Jatinangor 45363,
Indonesia
Ildrem Syafri,
Faculty of Geology, Padjadjaran University
Jln. Raya Bandung Sumedang Km 21, Jatinangor 45363,
Indonesia
E. T. Paripurno,
Department of Geology, National University of Development “Veteran”, Yogyakarta
Jln. SWK 104 (Lingkar utara) Condong Catur, Yogyakarta,
Indonesia