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 Organisation for Economic Co-operation and Development,"Bulgaria : science, research and technology",,Organisation for Economic Co-operation and Development,2004,Reviews of national policies for education,,9264007008,,https://cir.nii.ac.jp/crid/1130000795918833152