“THE STUDY OF DEOXYGENATION RATE OF RANGKUI RIVER WATER DURING DRY SEASON”, INTERNATIONAL JOURNAL OF GEOMATE, vol. 15, no. 47, pp. 164–169, Nov. 2021, Accessed: Apr. 19, 2026. [Online]. Available: https://geomatejournal.com/geomate/article/view/864