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
Great Britain. Post Office,"European Broadcasting Convention. Copenhagen, 15th September, 1948",,His Majesty's Stationery Office,1948,Cmd,,,,https://cir.nii.ac.jp/crid/1130282272725556480