Ledgard, Henry F.,  1943- <br/><br/>
Directions in human factors for interactive systems 
Henry Ledgard Andrew Singer,John Whiteside 
 - Berlin  Springer-Verlag  1981 
 - 190p. 25cm. 
 - Lecture notes in computer science  103 .
<br/><br/>Bibliography:p.177-188 Includes index 
<br/><br/><label>LCCN: </label>81-4593 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Interactive computer systems<br/>Human engineering