Orlinianto Pasauran, Irwan Lie Keng Wong, and Monika Datu Mirring Palinggi. “Pengaruh Penambahan Abu Bonggol Jagung Pada Tanah Lempung Terhadap Uji California Bearing Ratio”. Paulus Civil Engineering Journal 2, no. 4 (January 23, 2024): 218–226. Accessed July 24, 2025. https://ojs.ukipaulus.ac.id/index.php/pcej/article/view/295.