WASET
    M. A. Elbagermia and  A. I. Alajtala and  M. Alkerzab,  Chemical Analysis of Available Portland Cement in Libyan Market Using X-Ray Fluorescence .   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2014, vol. 85(1). 73 - 75
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/9997267.