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
"Sethuraman, S. V. and International Labour Office","The urban informal sector in developing countries : employment, poverty and environment",,International Labour Office,1981,A WEP study,,"9221025918,922102590X",,https://cir.nii.ac.jp/crid/1130000795925565440