Chōtanpa jidenkan
By: Mizuma Shōichirō, Tomonaga Shinʼichirō, Takao Iwao kyōcho
Edition: Shohan
Publisher: Koronasha
Published: 1948
Place of publication: Tōkyō
Language: jpn
Number of pages: 157
Subjects: Transmit-receive tubes; Shortwave radio