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
"Izumi, K. and Ranatunga, A. S.","Cost of production of paddy, Maha 1972/73 : a study based on farm record books maintained in five selected districts",,Agrarian Research & Training Institute,1974,Research study series,,,,https://cir.nii.ac.jp/crid/1130282270867019776