Ren gong dian hua jiao huan
By: Yu Kuangshi zhu
Edition: Zai ban
Series: Jiao tong cong kan. Dian xin lei di 1 zhong; Jiao tong cong kan
Publisher: Zhongguo jiao tong jian she xue hui
Published: 1956
Place of publication: Taibei
Language: chi
Number of pages: 84
Subjects: Telephone switchboards
Other titles: Dian hua jiao huan
Notes: Appendixes: p. 75-84.

Bibliography: p. 74.