Gregory, R. L. <br/><br/>
Illusion in nature and art / 
edited by R. L. Gregory and E. H. Gombrich, with contributions by Colin Blakemore [and others] 
 - [London] :  Duckworth ,  1973 . 
 - 288 p. :  illus. (part col.) ;  24 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0715607596 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Visual perception<br/>Optical illusions
<br/><br/><label>LC Class. No.: </label>QP495