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
"Crooks, G. R. and Ranbanda, H. A.",The economics of seasonal labour migration in Sri Lanka,,Agrarian Research and Training Institute,1981,Research study series,,,,https://cir.nii.ac.jp/crid/1130583072153145224