Dumas, Joseph S.,  1943- <br/><br/>
A practical guide to usability testing / 
Joseph S. Dumas, Janice C. Redish. 
 - Rev. ed. 
 - Exeter, England ;  Portland, Or. :  Intellect Books,  c1999. 
 - xxii, 404 p. :  ill ;  23 cm. 
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<br/><br/><label>ISBN: </label>1841500208 
<br/><br/><label>LCCN: </label>00265569 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human-computer interaction.
<br/><br/><label>Dewey Class. No.: </label>05.1/4