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
"Vries, J. de and Mvena, Z. S. K.","Sorghum production by smallholders in Morogoro district, Tanzania",,"Dept. of Rural Economy, Faculty of Agriculture, Forestry and Veterinary Science, University of Dar es Salaam",1979,Rural economy research paper,,,,https://cir.nii.ac.jp/crid/1130282271964218368