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
"Gann, Lewis H. and Duignan, Peter",Burden of empire : an appraisal of Western colonialism in Africa south of the Sahara,,Pall Mall Press,1968,Hoover Institution publication,,,,https://cir.nii.ac.jp/crid/1130000794393133440