ITU-T D.140 SUPP 2 SPANISH-2003
國際電話業務的結算率原則.系列D:通用資費原則.國際電話業務的收費和結算.2號補充案:升級的電信密度和指示目標的結算利率
Accounting rate principles for the international telephone service; SERIES D: GENERAL TARIFF PRINCIPLES General tariff principles Charging and accounting in the international telephone service; Supplement 2: Updated teledensities and indicative target set