00413nam a22001577i 450000500170000000800410001704100080005824500150006626000310008130000140011265000170012665000180014365300200016165500150018177300590019620141212095137.0911227s1991    sp     gr     000 0 spa c  aeng10aCASE STUDY  aNUEVA YORKbPERGAMON PRESS  a95-105 p.14aEvaluación14aMetodología10aAcción social 4aDocumental0 tEVALUATION AND PROGRAM PLANNINGgVol. 10, no. 1 (1987)