Lockwood, Fred. <br/><br/>
The Design and production of self-instructional materials / 

 - London :  Kogan Page,  1998. 
 - XVI, 160 p. : 
<br/><br/><label>ISBN: </label>0749414553 9780749414559 
<br/><br/><label>Dewey Class. No.: </label>371.3944 
<br/><br/><label>Universal Decimal Class. No.: </label>371.67:37.018.43