00494nam a22001937i 450000500170000000800410001704100080005810000160006624500430008226000180012530000150014365000300015865000130018865000140020165000130021565300200022865500150024877300370026320141212095204.0970506s1997    sp     gr     000 0 spa c  aeng1 aSCRIVEN, M.10aTHE THEORY BEHIND PRACTICAL EVALUATION  aLondresbSAGE  a393-404 p.14aEvaluación de servicios14aManuales14aProgramas14aTeoría10aAcción social 4aDocumental0 tEVALUATIONgVol. 2, no. 4 (1996)