“Temperature f Gold Mineralization In Tugurejo Area and Its Surrounding, Slahung Subdistrict, Ponorogo District, East Java Province, Indonesia”, IJSHRE, vol. 10, no. 4, Apr 2022, Diakses: Okt 21, 2026. Tersedia pada: https://ijournals.in/journal/index.php/ijshre/article/view/103