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 "Ndulu, B. J.",The impacts of inter-regional transport subsidy policy on commercial supply of food grains in Tanzania : the case of paddy and maize,,"Economic Research Bureau, University of Dar es Salaam",1980,E.R.B. paper,,,,https://cir.nii.ac.jp/crid/1130000795040066816