al-Ḥarakah al-Masraḥīyah fi al-Sūdān (1967-1978) : al-Masraḥ al-qawmī wa-mawāsamuh al-masraḥīyah - ʻUbayd, Saʻd Yūsuf (al-Hayʼah al-ʻArabīyah lil-Masraḥ, 2018)