“PENGARUH PENAMBAHAN ABU TANDAN KOSONG KELAPA SAWIT (TKKS) TERHADAP NILAI PENETRASI INDEKS ASPAL PERTAMINA PEN.60 70”. Siklus : Jurnal Teknik Sipil, vol. 2, no. 2, Oct. 2016, https://doi.org/10.31849/siklus.v2i2.353.