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
,The GDR's National Economic Plan and how it was fulfilled in 1972 : report published by the German Statistical Board of the GDR,,Verlag Zeit im Bild,1973,Documents on the policy of the German Democratic Republic,,,,https://cir.nii.ac.jp/crid/1130000795654907136