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
"Egudu, Romanus N. and Nwoga, Donatus Ibe",Igbo traditional verse,,Heinemann,1973,African writers series,,043590129X,,https://cir.nii.ac.jp/crid/1130000796230955264