Beyer, Hugh. <br/><br/>
Contextual design :  defining customer-centered systems / 
Hugh Beyer, Karen Holtzblatt. 
 - San Francisco, Calif. :  Morgan Kaufmann,  1998. 
 - xxiii, 472 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references (p. [449]-457) and index. 
<br/><br/><label>ISBN: </label>1558604111  RM18.070 
<br/><br/><label>LCCN: </label>97-035927 
<br/><br/><label>Subjects--Topical Terms: </label><br/>System design.<br/>System analysis.