Questionnaire related to the preapration for international conference on education in its forty third session to be held ing. Geneve 1992. 

 - Cairo :  National Centre for Educational Research,  1991. 
 - pág. irregular. 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>37(079.5 )(620)= 20 "1991" QUE.