al-Sayf fī al-ʿālam al-islāmī - Zakī, ʿAbd al-Raḥmān (Maṭābiʿ Dār al-Kitāb al-ʿArabī ; Maktabat al-Nahḍah al-Miṣrīyah, 1957)
Introduction dated: 1957.