Alles, Jinapala <br/><br/>
The Chalkboard :  a link between the teacher and the learner : a training document / 
by Jinapala Alles; written by A. W. Bartram. 
 - París :  New York :  UNESCO ;  UNICEF,  1981. 
 - 13, 12 p. :  il. 
 - Notes, comments... ;  82 .
<br/><br/><label>No. de Clasificación Universal Decimal: </label>371.3 (100) =20 ALL No.82.