International yearbook of educational and training technology, 1989 / 
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--Directories.