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 "Ungerer, Herbert and Costello, Nicholas",Telecommunications in Europe : free choice for the user in Europe's 1992 market : the challenge for the European Community,,"Office for Official Publications of the European Communities,Commission of the European Communities",1988,The European perspectives series,,9282582094,,https://cir.nii.ac.jp/crid/1130000795961999360