Kamil, Firmanilah. “Analisis Kepadatan Tanah Dengan Pengujian California Bearing Ratio (CBR)”. Journal of Research and Inovation in Civil Engineering as Applied Science (RIGID) 1, no. 2 (Juli 30, 2022): 42-48. Diakses April 19, 2024. https://jurnal.politap.ac.id/index.php/rigid/article/view/1189.