“Perhitungan Cadangan Batupasir Di Derah Perencanaan Tambang Desa Pegongsoran, Kecamatan Pemalang, Kabupaten Pemalang, Jawa Tengah: Calculation of Sandstone Reserves in the Mine Planning Area Pegongsoran Village, Pemalang District, Pemalang Regency, Central Java”. MINERAL 6, no. 1 (April 1, 2021): 1–5. Accessed July 22, 2026. https://journal.ubb.ac.id/index.php/mineral/article/view/3078.