Citation
Duʿbus, Muḥammad Yusrī. Al-Ittiṣāl wa-l-Sulūk al-Insānī: Ruʾyā Fī Anthrūbūlūjiyyā al-Ittiṣāl. Alexandria: al-Bīṭāsh Sintir li-l-Nashr wa-l-Tawzīʿ , 1999.
Duʿbus, Muḥammad Yusrī. Al-Ittiṣāl wa-l-Sulūk al-Insānī: Ruʾyā Fī Anthrūbūlūjiyyā al-Ittiṣāl. Alexandria: al-Bīṭāsh Sintir li-l-Nashr wa-l-Tawzīʿ , 1999.