Hidayat, R., Azka, C. N., Fatimah, A. and Firmansyah, T. A. (2025) “Subgrade Optimization with Coconut Shell Ash Addition on Glee Gurah Clay Soil”, Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil, 9(2), pp. 393–402. doi: 10.32832/komposit.v9i2.19087.