International yearbook of educational and training technology 1989 / 
Association for Educational and Training Technology ; editor C.W. Osborne. 
 - London:   Kogan Page,   1989.  
 - 475 p. ;  24 cm. 
<br/><br/><label>ISBN: </label>1850917760 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational technology
<br/><br/><label>Dewey Class. No.: </label>371.3078