Zentei rōdō undōshi nempyō
Subtitle: Meiji sanjūnen-Shōwa sanjūnen
Publisher: Zen Teishin Rōdō Kumiai Zenteishi Hensan Iinkai
Published: 1959
Place of publication: [Tōkyō]
Language: jpn
Number of pages: 109
Subjects: Telecommunication; Labor and laboring classes