Bei Mei chang tu dian hua zi dong bo hao zhi zhi yan jiu
By: Miao Chaofeng bian zhu
Series: Yan jiu cong kan. Dian xin lei; Yan jiu cong kan
Publisher: Jiao tong bu jiao tong yan jiu suo
Published: 1959
Place of publication: [Taibei]
Language: chi
Number of pages: 162
Subjects: Automatic Telephone