CAVE TOURISM #2 – CERME 26 July, 2012 by ascyogyakarta · Published 26 July, 2012 · Last modified 17 June, 2015
Pendidikan dan Latihan (DIKLAT) Speleologi XVI – Acintyacunyata Speleological Club 12 February, 2013 by ascyogyakarta · Published 12 February, 2013 · Last modified 3 June, 2015