Williams, Peter. <br/><br/>
Planning teacher demand and supply/ 
Peter Williams. 
 - París :  UNESCO;  International Institute for Educational Planning,  1979. 
 - 99 p. ;  fot. 
 - Fundamentals of educational planning ;  27 .
<br/><br/><label>ISBN: </label>9280310798 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>37.082 =20 WIL No.27.