“MODIFIKASI MATA BOR HAND AUGER BERBAHAN BEKAS SPRING MOBIL UNTUK KEGIATAN SAMPLING ALUVIAL DI KABUPATEN KETAPANG”. JUMPE : Journal of Mining, Mineral Processing, and Energy 1, no. 01 (December 12, 2023): 9–13. Accessed December 8, 2025. https://jurnal.politap.ac.id/index.php/jumpe/article/view/1257.