ITU-T D.85-1989 Charging for International Phototelegraph Calls to Multiple Destinations - General Tariff Principles - Charging and Accounting in International Telecommunications Services (Study Group III) 1 pp
1989ITU-T D.85-1989 Charging for International Phototelegraph Calls to Multiple Destinations - General Tariff Principles - Charging and Accounting in International Telecommunications Services (Study Group III) 1 pp