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 "Bantje, Han",Household differentiation and productivity : a study of smallholder agriculture in Mbozi District,,"Institute of Resource Assessment, University of Dar es Salaam",1986,Research paper,,,,https://cir.nii.ac.jp/crid/1130282272077919616