Genzon bōryokudan no jittai
Subtitle: dai 2-ji hōkoku
By: [henshū Kagaku Keisatsu Kenkyūjo]
Series: Kakeiken shiryō -- dai 54-gō
Publisher: Kagaku Keisatsu Kenkyūjo
Published: 1969
Place of publication: Tōkyō
Language: jpn
Number of pages: 130
Subjects: Gangs
Notes: Cover title.