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 "Hesselmark, Olof and University of Nairobi. Institute for Development Studies",The marketing of maize and beans in Kenya : a proposal for improved effectiveness,,"Institute for Development Studies, University of Nairobi",1977,Working paper,,,,https://cir.nii.ac.jp/crid/1130282270822801664