S. M. K. Saleh, M. M. Taher, and B. O. A. Saif, “ESTMAITION OF HEAVY METALS IN THE GROUNDWATER OF SELECTED AREAS FROM AL-DHALIA DISTRICT, AL-DHALIA GOV., YEMEN”, Electron. J. Univ. Aden Basic Appl. Sci., vol. 1, no. 3, pp. 151–158, Sep. 2020.