"EFFECT OF LAGOON AND FRESH WATERS ON THE COMPRESSIVE AND SPLIT TENSILE STRENGTH OF GRADE 40 CONCRETE". FULafia Journal of Science and Technology , م 4, عدد 2, ديسمبر، 2018, ص 30-34, https://lafiascijournals.org.ng/index.php/fjst/article/view/124.