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 "Nkamleu, Guy Blaise",Root causes of the food crisis : technological progress and productivity growth in African agriculture,,Nova Science Publishers,2010,"African political, economic and security issues series",,9781626185593,,https://cir.nii.ac.jp/crid/1130000793717117184