Jāmiʻat al-Yarmūk, Iḥsān ʻAbbās, Muḥammad ʻAdnān Bakhīt, Jāmiʻah al-Urdunīyah, International Congress of the History of Bilad al-Sham (4th 1985 al-Jāmiʻah al-Urdunīyah)