Seckel, Al <br/><br/>
More optical illusions / 
Al Seckel 
 - [S.l.] :  Carlton,  c2002 
 - 160 p. :  col. ill. 
<br/><br/><label>ISBN: </label>1842224875 
<br/><br/><label>Subjects--Topical Terms: </label><br/>OPTICAL ILLUSIONS<br/>VISUAL PERCEPTION
<br/><br/><label>LC Class. No.: </label>QP495  / S424M