T. Syahrulyati, S. Irianto, and Y. Suhendi, “Reserve Potential Sandy Clay as a Raw Materials Cement Village Hambalang, County Citeureup District Bogor Province Jawabarat – Indonesia”, IJET, vol. 7, no. 3.20, pp. 398–401, Sep. 2018, doi: 10.14419/ijet.v7i3.20.20580.