2 1 50 Fauzi, Imron Primary Author Jaya, Aziz Fardhani Primary Author Masyarakat Speleologi Indonesia Primary Author Aji Hendro Susanto Primary Author Choirul Anam Primary Author Dion Galuh Primary Author Januario Bramasto Primary Author Mukti Satiti Primary Author Muhammad Rauzan Primary Author Wida Papang Primary Author Yulis Dwian Gria Primary Author mixed material Kabupaten Trenggalek Masyarakat Speleologi Indonesia 2017 AK, Viedela Primary Author Kharismadewi, Sheila Primary Author Nivo, Sherly Gustia Primary Author Kasrizal Primary Author Arkan, Hanif Ibrahim Primary Author Ginting, Andayani Oerta Primary Author Jaya, Aziz Fardhani Primary Author Istichomah, Sudiah Editor Mustikasari, Rita Editor mixed material Bogor Lawalata IPB 2015