Gongzhe dian fu
Subtitle: Zhongguo san zi dian bao shu
By: zhu zuo zhe Chen Gongzhe
Edition: Chu ban
Publisher: Gongzhe dian fu fa xing suo
Published: 1927
Place of publication: Shanghai
Language: chi
Number of pages: 144
Subjects: Cipher and telegraph codes; Telegraph
Other titles: Zhongguo san zi dian bao shu