Al-Mallah, S., سحر, Buker, R. and رجب (2005) “NATURAL MINERAL CLYS BEARING FELDSPAR,PYSICAL AND STRUCTURAL STUDIES AND APPLICATION IN PERTOLEUM FRACTIONATION”, Journal of Education and Science (JES), 17(4), pp. 42–53. doi: 10.33899/edusj.2005.83069.