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 "Dunham, David M. and Institute of Policy Studies (Colombo, Sri Lanka)",Producer price statistics for staple foodcrops in Sri Lanka : the case of paddy,,Institute of Policy Studies,1996,Research studies,,9559122479,,https://cir.nii.ac.jp/crid/1130282271639919616