Iqbal, Muhammad Fadil, and Wawong Dwi Ratminah. 2018. “NERACA SERTA POTENSI SUMBERDAYA BATU ANDESIT DI KOTA SINGKAWANG PROVINSI KALIMANTAN BARAT”. ReTII, November. //journal.itny.ac.id/index.php/ReTII/article/view/972.