Designing usable texts / 
edited by Thomas M. Duffy and Robert Waller. 
 - Orlando :  Academic Press,  1985. 
 - xv, 423 p. :  ill. 
 - The Educational technology series .
<br/><br/><label>ISBN: </label>0122232607 (alk. paper) 
<br/><br/><label>LCCN: </label>91034100     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Textbooks--Authorship.