Nichi-Ro mondai
By: Kawamura Sadashirō jutsu
Series: Keisatsu kyōyō shiryō -- dai 5-hen
Publisher: Keisatsu Kōshūjo Gakuyukai
Published: 1925
Place of publication: Tōkyō
Language: jpn
Number of pages: 29
Notes: Issued as confidential document.