Current approaches to delinquency: 1949 yearbook ; current opinion on the treatment and prevention of delinquency and crime ; papers given at the forty-second annual conference of the association in Cleveland, June 9-13, 1949, and at the Congress of Correction in Milwaukee, September 25-30, 1949 - Bell, Marjorie (Yearbook / National Probation and Parole Association, 1950)