Ariyadasa, K. D <br/><br/>
In-service training of teachers in Sri Lanka / 
by K. D. Ariyadasa. 
 - París :  Ginebra :  UNESCO ;  OIE,  1976. 
 - 56 p. :  il. 
 - Experiments and innovations in education ;  23 .
<br/><br/><label>ISBN: </label>9231013475 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>371.14 (548.7) =20 ARI No.23.