Hōsō musen denwa.
By: [henchosha Jitsuyō Tsūshin Kōgaku Sōsho Iinkai].
Contributors: Jitsuyō Tsūshin Kōgaku Sōsho Iinkai.
Edition: Saihan
Publisher: Denki Tsūshin Gakkai
Published: 1947
Place of publication: Tōkyō
Language: jpn
Number of pages: 76
Subjects: Radiotelephone.; Telephone, Wireless.