Bōchō to kimitsu hogo
By: [chosakunin Okada Yoshihito]
Contributors: Minami Manshū Tetsudō Kabushiki Kaisha. Bōeihan
Series: Bōchō sōsho -- dai 2-shū
Publisher: Minami Manshū Tetsudō Kabushiki Kaisha Sōsaishitsu Bōeihan
Published: 1939
Place of publication: Hōten-shi
Language: jpn
Number of pages: 98
Subjects: Intelligence service; Official secrets; Classified Defense information
Notes: Cover title.