Irfan, Ulva Ria, Irzal Nur, and Muhammad Kasim. 2017. “Hydrothermal Alteration Mineralogy Associated With Gold Mineralization in Buladu Area, Gorontalo, Northern Sulawesi, Indonesia”. International Journal on Advanced Science, Engineering and Information Technology 7 (6):2244-50. https://doi.org/10.18517/ijaseit.7.6.3837.