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 "Igwara, Obi Patience","Ethnicity, nationalism and nation-building in Nigeria, 1970-1992",,Supplied by the British Library Document Supply Centre,1993,British thesis service,,,,https://cir.nii.ac.jp/crid/1130282269143723776