Programmed learning and educational technology 
Proceedings of the conference...........................5-8 April, 1968 
 - London:   Methuen & Co Ltd,   1969 
 - ix, 671p. 
<br/><br/> Vol. 2 Aspects of educational technology 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Proceedings
<br/><br/><label>Universal Decimal Class. No.: </label>37.02(075.5)(082.2)  / K9