Ibrahim A. Nasir , Hasan Alkhadafe , Kadja Mohammed. (2018). ????? ?????? ????? ?????? ????? ?????? ????? ???????? ?????? ?????? PIC ?????? ?????? ??? ??????? ??? ????. مجلة العلوم البحتة والتطبيقية, 17(1). https://doi.org/10.51984/jopas.v17i1.135