Thomas, R. Murray <br/><br/>
Formal and non-formal education options :  some suggestions for creating and communicating / 
by R. Murray Thomas. 
 - París :  New York :  UNESCO ;  UNICEF ;  1980. 
 - 13 p. 
 - Notes, Comments... ;  47. .
<br/><br/><label>No. de Clasificación Universal Decimal: </label>374 (100) =20 THO No.47.