Guo ji chuan bo dian bao bian yi ji chu
By: Ge Xingyan bian [xie].
Edition: Di 1 ban
Publisher: Ren min jiao tong chu ban she; Xin hua shu dian Beijing fa xing suo fa xing
Published: 1981
Place of publication: Beijing Shi
Language: chi
Number of pages: 213
Subjects: Cipher and telegraph codes -- Shipping.
Notes: Title page dated 1979.