Shepard, Roger N. <br/><br/>
Mind sights :  original visual illusions, ambiguities and other anomalies, with a commentary on the play in perception and art / 
Roger N. Shepard. 
 - New York :  W.H. Freeman and Co.,  1990. 
 - 213 p. 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>0-7167-2134-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Optical illusions<br/>Visual perception