An Analysis of Factors Contributing to Delinquency in Low Teens - First Report: Focusing on the Self-Perception of Juveniles - Nakamura, Masanori; Tokuyama, Takayuki; Yokokoshi, Aiko; Sawata, Naoko; Muroi, Seiichi; Yosida, Hiroyuki (Bulletin of the Criminological Research Department / Research and Training Institute, 1984)