The international encyclopaedia of educational technology 

 - England :  Pergamon,  1989. 
 - xxii,654p.;  26cm 
<br/><br/><label>ISBN: </label>80334091 
<br/><br/><label>Subjects--Topical Terms: </label><br/>School Education
<br/><br/><label>Dewey Class. No.: </label>371.307  / INT