Ray, Colin. <br/><br/>
Library service to schools and children / 
Colin Ray. 
 - París :  UNESCO,  1979. 
 - 137 p. :  il. 
 - Documentation, libraries and archives :  studies and research- .
<br/><br/><label>ISBN: </label>9231016407 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>027.8 =20 RAY No.10.