00957nam0-22003011--450-99000909208040332120090923154828.0000909208FED01000909208(Aleph)000909208FED0100090920820090921d1951----km-y0itay50------baengUSy-------001yy<<An >>experiment in the prevention of delinquencythe Cambridge-Somerville youth studyby Edwin Powers and Helen Witmerwith a foreword by Gordon W. AllportNew YorkColumbia University press1951XLIII, 649 p.24 cm34511 rid.itaPowers,Edwin506010Witmer,Helen506011ITUNINARICAUNIMARCBK990009092080403321XII F 4444164FGBCFGBCExperiment in the prevention of delinquency785419UNINA