Dai Tōa no kaiun
By: Hirai Kōichi kōen
Series: Shiryō. Gaiotsu -- dai 45-gō B; Shiryō (Tōa Kenkyūjo (Tokyo, Japan)) -- dai 45-gō B.
Publisher: Tōa Kenkyūjo
Published: 1942
Place of publication: Tōkyō
Language: jpn
Number of pages: 28
Notes: Cover title.

"Hi" (confidential document).