Percival, Fred <br/><br/>
A handbook of educational technology / 
Fred Percival & Henry Ellington 
 - London :  Kogan Page,  1984 
 - 248p. :  ill.;  23 cm. 
<br/><br/><label>LCCN: </label>82-24655 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational technology--Handbooks, manuals, etc