Citation
al-Khafīf, Ayman Ibrāhīm. Dirāsa li-Baʿḍ al-ʿAwāmil al-Ijtimāʿiyya al-Muttaṣila bi-Istihlāk al-Dhurra fī al-Rīf al-Miṣrī. Cairo: Jāmiʿat ʿAin Shams, Kulliyyat al-Zirāʿa, Qism al-Iqtiṣād al-Manzilī, 1978.
al-Khafīf, Ayman Ibrāhīm. Dirāsa li-Baʿḍ al-ʿAwāmil al-Ijtimāʿiyya al-Muttaṣila bi-Istihlāk al-Dhurra fī al-Rīf al-Miṣrī. Cairo: Jāmiʿat ʿAin Shams, Kulliyyat al-Zirāʿa, Qism al-Iqtiṣād al-Manzilī, 1978.