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 "Morel, E. D. (Edmund Dene) and Nworah, Kenneth Dike",Nigeria: its peoples and its problems,"3rd ed., with a new introduction by Kenneth Dike Nworah",Cass,1968,Cass library of African studies,,,,https://cir.nii.ac.jp/crid/1130000795481163648