setiyawan, Reynaldo, and okki verdiansyah. “Mineralogy of Hydrothermal Alteration Rocks in Kaligono Region, Kaligesing District, Purworejo Regency, Central Java”. ReTII (November 9, 2021): 471 - 478. Accessed July 2, 2022. //journal.itny.ac.id/index.php/ReTII/article/view/2652.