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 "Magyar Tudományos Akadémia. Afro-Ázsiai Kutató Központ and Lewis, A. Olufemi","Nigeria's exports : problems, prospects, and implications for economic growth",,Center for Afro-Asian Research of the Hungarian Academy of Sciences,1973,Studies on developing countries,,,,https://cir.nii.ac.jp/crid/1130000794583017472