Shepard, Roger N. <br/><br/>
Mind sights:original visual illusions, ambiguities and 

 -  W.H.Freeman & Co.  1990 
 - x, 228 p. 
<br/><br/><label>ISBN: </label>0-7167-2133-3  1,610.09 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PSYCHOLOGY
<br/><br/><label>Dewey Class. No.: </label>152.148  / SHE