ITU-T SERIE E.300 SUPP 5 SPANISH-1984 实验测试设计对于无经验的用户难以建立全国范围内使用的指令提供国际长途电话的决心模型,或者比较不同的指令集
Modelling of an experimental test design for the determination of inexperienced user difficulties in setting up international calls using nationally available instructions, or to compare different sets of instructions