., Yuwono, Eko Yuli Handoko, and Ahmad Ayyash Islami. “EMBUATAN LUR ELAYARAN APAL AMBANG ADA UNGAI ENGGUNAKAN ULTIBEAM CHOSOUNDER (STUDI ASUS: UNGAI AHAKAM)”. GEOID 14, no. 2 (February 1, 2019): 130–134. ccessed December 6, 2025. https://journal.its.ac.id/index.php/geoid/article/view/1615.