Denki Kyōkai Dai 1, 3 Bukai dai 7-kai eigyō gijutsu kenkyūkai kiroku
Contributors: Denki Kyōkai (Japan). Dai 1, 3 Bukai Gijutsu Kenkyūkai
Series: Denki jigyō shiryō -- no. 59
Publisher: Denki Kyōkai
Published: 1938
Place of publication: Tōkyō
Language: jpn
Number of pages: 43