Kahoku no kakushu dojō ni okeru ni san sakumotsu no hatsuga no sai.
Contributors: Tōa Kenkyūjo (Tokyo, Japan)
Series: Shii Hokuni chūkan hōkoku -- dai 2-gō
Publisher: Tōa Kenkyūjo
Published: 1941
Place of publication: [Tokyo]
Language: jpn
Number of pages: 10
Notes: Report by Akimoto Shinjirō and Yamada Noboru. Cf. Preface.