Sekular, Robert. <br/><br/>
Perception / 
Robert Sekuler, Randolph Blake. 
 - 2nd. ed. 
 - New York :  McGraw-Hill,  1990. 
 - 519 p. :  ill. ;  24 cm. 
<br/><br/>p. 463-496 
<br/><br/><label>ISBN: </label>007056065x 
<br/><br/><label>LCCN: </label>89-48905 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Perception.