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 Broadcasting : copy of an agreement dated 28th June 1954, between the Postmaster-General and the British Broadcasting Corporation : supplemental to a Licence and Agreement made the 12th June 1952 between the parties Her Majesty's Stationery Office 1954 Cmd 9196 https://ci.nii.ac.jp/ncid/BA8299019X