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 "Schmidt, Günter",The efficiency of marketing systems for agricultural products in Pakistan's Punjab,,Verlag Breitenbach,1982,Sozialökonomische Schriften zur Agrarentwicklung,,3881562214,,https://cir.nii.ac.jp/crid/1130282270242669568