T. Syahrulyati, S. Irianto, and Y. Suhendi, “Reserve Potential Sandy Clay as a Raw Materials Cement Village Hambalang, County Citeureup District BogorProvince Jawabarat – Indonesia”, IJET, vol. 7, no. 3.30, pp. 167–171, Aug. 2018, doi: 10.14419/ijet.v7i3.30.19084.