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 "Piddington, Helen R. and Food and Agriculture Organization of the United States",New forms of mutual assistance among farmers in the United Kingdom,,Plunkett Foundation for Cooperative Studies,1970,Plunkett Foundation for Co-operative Studies,,0850420024,,https://cir.nii.ac.jp/crid/1130282271644217472