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100   $a20090921d1951----km-y0itay50------ba
101 0 $aeng
102   $aUS
105   $ay-------001yy
200 1 $a<<An >>experiment in the prevention of delinquency$ethe Cambridge-Somerville youth study$fby Edwin Powers and Helen Witmer$gwith a foreword by Gordon W. Allport
210   $aNew York$cColumbia University press$d1951
215   $aXLIII, 649 p.$d24 cm
676   $a345$v11 rid.$zita
700  1$aPowers,$bEdwin$0506010
701  1$aWitmer,$bHelen$0506011
801  0$aIT$bUNINA$gRICA$2UNIMARC
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996   $aExperiment in the prevention of delinquency$9785419
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