Analysis of Cavities Characteristics in the Semar - Kiskendo Caves System, Jonggrangan Karst Area, Kulon Progo, IndonesiaRomza Fauzan Agniy, Risma Sari Septianingrum, Ariel Seto Adinugraha, Qodri Alghozali, Bagas Aditya, Ahmad Cahyadi and Tjahyo Nugroho AdjiE3S Web Conf., 125 (2019) 01016DOI: https://doi.org/10.1051/e3sconf/201912501016