著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Hassan, Yusuf Fadl and University of Khartoum. Sudan Research Unit","Sudan in Africa : studies presented to the first international conference sponsored by the Sudan Research Unit, 7-12 February, 1968",,Khartoum University Press,1971,Sudanese studies library,,,,https://cir.nii.ac.jp/crid/1130000797726436608