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 "Ibrahim, Ahmed Uthman Muhammad","The dilemma of British rule in the Nuba Mountains, 1898-1947",,"Graduate College, University of Khartoum,Distributed by Ithaca Press",1985,Graduate College publications,,,,https://cir.nii.ac.jp/crid/1130000795828156672