MODIFICATION OF HAND AUGER DRILL BIT MADE FROM USED CAR SPRINGS FOR ALLUVIAL SAMPLING ACTIVITIES IN KETAPANG DISTRICT. JUMPE [Internet]. 2023 Dec. 12 [cited 2026 Sep. 25];1(01):9-13. Available from: https://jumpe.jurnal.politap.ac.id/index.php/jumpe/article/view/1257