邮电科学技术参考資料
Subtitle: Jia zhong : Di 1-3 qi
By: You dian bu you dian ke xue yan jiu yuan ke xue qing bao shi bian
Published: 1958
Place of publication: n.p.
Language: chi
Subjects: Postal service; Telegraph; Telephone; Electrical engineering
Other titles: You dian ke xue ji shu can kao zi liao