Alden, Jay. <br/><br/>
Backward Chaining : Teaching Task Performance. 

 -  Educational Technology Pub.  1978 
 - XI, 69 P. ; 23 CM. 
<br/><br/> THE INSTRUCTIONAL DESIGN LIBRARY ; V.6 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>877781109 
<br/><br/><label>Dewey Class. No.: </label>371.3 ALD 1978