Percival, Fred and Ellington, Henry <br/><br/>
A handbook od educational technology 

 - 2nd ed. 
 - New York  ; Kogan Page  , 1988 
 - 273p. 
<br/><br/><label>ISBN: </label>0893972975  £12.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education
<br/><br/><label>Dewey Class. No.: </label>370  / PER