Maryanto, S. and Hasan, R. 2011. Regression-Correlation of Petrophysical Inter-Parameter of Igneous Rocks and Limestone from Kulonprogo Mountain Region, Yogyakarta Special Region. Indonesian Journal on Geoscience. 6, 4 (Dec. 2011), 203–211. DOI:https://doi.org/10.17014/ijog.6.4.203-211.