Delfi kurnia zebua. “Environmental Management Strategies in Overcoming Impacts Sand Mining on the Cumbadak River and Tuak River”. Indonesia Journal of Engineering and Education Technology (IJEET) 3, no. 1 (August 12, 2025): 33–47. Accessed August 21, 2025. https://journal.ataker.ac.id/index.php/ijeet/article/view/161.