Ḥalqah al-Dirāsīyah ʻan Rabṭ Barāmij Maḥw al-Ummīyah al-Waẓīfī bi-Mashrūʻāt wa-al-Khidmāt fī al-Bilād al-ʻArabīyah (1969 Khartoum, Sudan)