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
"Udry, Christopher and Yale University. Economic Growth Center","Risk, insurance and default in a rural credit market : an empirical investigation in Northern Nigeria",,Yale University. Economic Growth Center,1991,Center discussion paper,,,,https://cir.nii.ac.jp/crid/1130000796496965504