Valin, E. <br/><br/>
The Value of examinations :  a technical study carried out in the Lebanon 
by E. Valin. 
 - París :  UNESCO,  1961. 
 - 38 p. :  fot. 
 - Educational studies and documents ;  40 .
<br/><br/><label>No. de Clasificación Universal Decimal: </label>371.26/. 27 (569.3) =20VAL No.40.