Seckel, Al <br/><br/>
Ambiguous optical illusions 
Al Seckel 
 - New Delhi  Sterling Publishing  2005 
 - 96 p. : chiefly col. ill. ; 21 x 21 cm 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9781402718298 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Optical illusions - Juvenile literature<br/>Sensory perception
<br/><br/><label>Dewey Class. No.: </label>152.148 SEC