Makhṭūṭāt ʿarabīyah fī Maktabat Ṣūfīyā al-waṭanīyah al-bulghārīyah - ʿIzz al-Dīn, Yūsuf, (Maṭbaʿat al-Majmaʿ al-ʿilmī al-ʿIrāqī, 1968)