Perry, Patricia <br/><br/>
Instruction on concrete operations for children who are mildly mentally retarded 

 - 273-281 
 - 27, No. 3, 1992 
<br/><br/>Mayo 1993 
 = EDUCATION AND TRAINING IN MENTAL RETARDATION 
<br/><br/><label>Encabezamiento--Término de Indización: </label>EFICACIA DE LA ENSE\197ANZA ENSE\197ANZA INDIVIDUALIZADA RETRASO MENTAL MODERADO TEORIA PIAGETIANA