Fares, F., Shaltami, O., Saad , E., Mohamed, F. . and El Gahmi, M. (2022) “Comparative study of ordinary portland cement from different production (Al Fatiah and Al Huarry cement factories), NE Libya”, Libyan Journal of Science &Technology, 5(1). doi: 10.37376/ljst.v5i1.2166.