The design and production of self instructional materials 
Lockwood, Fred. 
 -  Kogan Page Ltd.  1998 
 - 160 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>0-7494-1455-3 
<br/><br/><label>Dewey Class. No.: </label>371.3 L81d 1998