Hofstadter, Douglas R <br/><br/>
Godel, Escher, Bash :  An eternal golden braid / 
By D. R. Hofstadter. 
 - New York :  Vintage Books,  1980. 
 - XXI, 777 p. :  ill. ;  23 cm. 
<br/><br/>Bibliogr. pp. 746-756 Index pp. 757-777 
<br/><br/><label>ISBN: </label>0-394-74502-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematic<br/>Symmetry<br/>Artificial intelligence