“INFLUENCE OF VOLCANO ERUPTION TO WEATHERABLE MINERALS AND CHEMICAL PROPERTIES OF RED SOILS IN SOUTH SUMATRA, INDONESIA”, INTERNATIONAL JOURNAL OF GEOMATE, vol. 19, no. 76, pp. 118–125, Dec. 2020, Accessed: May 21, 2026. [Online]. Available: https://geomatejournal.com/geomate/article/view/1083