00394nam a2200133Ia 4500020001800000082001600018100002100034245003800055260004200093300001000135650003100145650006300176700002100239  a0-8039-3705-9  a361.6 BER-;  aBerk, Richard A. 0aThinking about program evaluation  aNewbury ParkbSage Publicationsc1990  a128p.  aSocial sciences - Research  aEvaluation research (Social action programs) - Utilization  aRossi, Peter H.