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 "Dellin, L. A. D.",Bulgaria,,"Published for the Mid-European Studies Center of the Free Europe Committee, by Atlantic Books,Distributed by Stevens",1957,East-Central Europe under the Communists,,,,https://cir.nii.ac.jp/crid/1130000795122350336