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 "Akiyama, T. (Takamasa) and World Bank. International Economics Dept.",Is there a case for an optimal export tax on perennial crops?,,"International Economics Dept., World Bank",1992,Policy research working papers,,,,https://cir.nii.ac.jp/crid/1130000798207715456