Yusuf Fadl Hasan (Professor): Studies in the History of Sudan, Part One. Khartoum, 1979. University of Khartoum, Dar al-Ta'lif wa al-Nashr. Yusuf Fadl Hasan (Professor): Aspects of the History of Islam in Sudan. Khartoum: Dar al-Fikr lil-Tiba'a wa al-Nashr. Conference on Islam in Sudan / Group for Islamic Thought and Culture. Yusuf Fadl Hasan (Professor): The origin and function of "Shalukh" in the Middle Nile Valley of Sudan, second edition. Khartoum: Dar Jami'at al-Khartoum lil-Nashr, 1989. Al-Nabhani, Yusuf bin Ismail: Jawahir al-Bihar fi Fada'il al-Nabi al-Mukhtar (peace be upon him), Part Two. Mustafa al-Babi al-Halabi, 1991. Al-Nabhani, Yusuf bin Ismail: Jami' Karamat al-Awliya' (no date). Second: University Theses: Al-Nasir Abu Kuruk: History of the City of Kassala. Master's thesis, Faculty of Arts, University of Cairo, 1981. Printed on a typewriter. 1979. Ahmad Othman Muhammad Ibrahim: Al-Jazira during the Mahdiyya. Master's thesis, Faculty of Arts, University of Khartoum, 1981. Printed on a typewriter. 1979. Third: Interviews: Mr. Ahmad bin Muhammad Othman bin Ahmad bin Muhammad Othman Al-Mirghani (Lecturer at the Faculty of Medicine, Omdurman Islamic University), born 1939. Interview about the relationship between the family of Mr. Ahmad and Mr. Ali Al-Mirghani and the religious and political stances of the family of Mr. Muhammad Othman (Shambat) in the Khatmiyya Tariqa. In his home in Shambat, near the Faculty of Agriculture, University of Khartoum. 1991/03/10. Sheikh Hassan bin Sheikh Muhammad Al-Fatih Qarib Allah, Sheikh of the Sammaniyya Sajada. Interview about the Mahdiyya and its connection to the Sammaniyya. In his home in Wad Nubawi, Omdurman. April 1991. Khalifa Muhammad Nur Al-Badawi Hamed Ali Saleh, born 1928. Interview about miracles among the Khatmiyya. In his home in Omdurman. 1991/01/17.