ITU-T D-series Recommendation – Supplement 3 Series D: General tariff principles. Supplement 3: Handbook on the methodology for determining costs and establishing national tariffs

ITU-T D-series Recommendation – Supplement 2 Series D: General tariff principles. Charging and accounting in international telecommunications services. Method for carrying out a cost price study regional tariff groups ITU-T D-series Recommendation – Supplement 1 Series D: General tariff principles. Charging and accounting in international telecommunications services. Cost and tariff study method ITU-T Recommendation D.606 R Charging and accounting in international telecommunication services. Preferential rates in telecommunication relations between countries in Africa ITU-T Recommendation E.100 Telephone network and ISDN. Operation, numbering, routing and mobile service. Definitions of terms used in international telephone operation ITU-T Recommendation E.104 Telephone network and ISDN. Operation, numbering, routing and mobile service. International telephone directory assistance service and public access CCITT Recommendation E.105 Telephone network and ISDN. Operation, numbering, routing and mobile service. International telephone service