Halls, W. D. <br/><br/>
International equivalences in access to higher education / 
W.D.Halls. 
 - Paris :  UNESCO,  1971. 
 - 137 p. ;  tabl. 
 - Studies on international equivalences of degrees .
<br/><br/><label>No. de Clasificación Universal Decimal: </label>378.2 (100) =20 HAL.