Syahrulyati, T.; Irianto, S.; Suhendi, Y. Reserve Potential Sandy Clay As a Raw Materials Cement Village Hambalang, County Citeureup District BogorProvince Jawabarat – Indonesia. IJET 2018, 7 (3.30), 167-171. https://doi.org/10.14419/ijet.v7i3.30.19084.