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
"Akademie der Wissenschaften der DDR and Panorama DDR (Firm) and Intertext, Fremdsprachendienst der DDR and Pergamon Press, ltd",Information GDR : the comprehensive and authoritative reference source of the German Democratic Republic,,Pergamon Press,1989,Countries of the world information series,,0080370659,,https://cir.nii.ac.jp/crid/1130282272967033472