Jikken hikki
By: Ōoka Shigeru, Kuroda Yoshirō
Series: Musen tsūshinshi shikaku kentei shiken mondai kaitōshū -- dai 2-kan
Publisher: Daikyōsha
Published: 1949
Place of publication: Tōkyō
Language: jpn
Number of pages: 103
Subjects: Problems, exercises; Wireless Telegraph