Setianto, Agung, Bayu Raharja, and Anastasia Dewi Titisari. 2021. “Application of Landsat 8 Image in An Assessment of Hydrothermal Alteration Mapping in Dense Vegetation: A Case Study from Kokap Area, Kulon Progo”. Indonesian Journal on Geoscience 9 (1):45-60. https://doi.org/10.17014/ijog.9.1.45-60.