Shōw jūgonendo kyūshō kankei busshi yō yunyūgaku shirabe
Subtitle: Kunibetsu yunyū no bu
By: Bōeki Iinkai, Sōmukyoku fukusha
Contributors: Japan. Shōkōshō. Sōmukyoku
Publisher: s.n.]
Published: 1940
Place of publication: [Tokyo
Language: jpn
Number of pages: 34
Other titles: Shōwa 15-nen kyūshō kankei busshi yō yunyūgaku shirabe.; kyūshō kankei busshi yō yunyūgaku shirabe.
Notes: Cover title.

Issued as top secret document.