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
"Christensen, Cheryl and United States. Dept. of Agriculture. Economic Research Service",Food problems and prospects in Sub-Saharan Africa : the decade of the 1980's,,"U.S. Dept. of Agriculture, Economic Research Service",1981,Foreign agricultural economic report,,,,https://cir.nii.ac.jp/crid/1130282269499312256