ITU-T D.195-1989 国际电信账户余额的结算 一般资费原则 国际电信服务的计费和会计(第 III 研究组;2 页;已取消)
Settlement of International Telecommunication Balances of Accounts - General Tariff Principles - Charging and Accounting in International Telecommunications Services (Study Group III; 2 pp; Cancelled)