ITU-T D.603R-2002
对非洲内部通话的最小收集费 系列D:一般资费原则-区域应用的建议-适用于非洲国家地区的建议 研究组3
Minimizing collection charges on inter-African calls SERIES D: GENERAL TARIFF PRINCIPLES Recommendations for regional application Recommendations applicable to the African Region Study Group 3