Sagan, Carl <br/><br/>
Dragons of eden: speculations on the evolution of human intelligence 

 - 1st 
 - New York  Ballantine  1993 
 - xii,271p p. 
<br/><br/><label>ISBN: </label>0-345-34629 7 
<br/><br/><label>Subjects--Index Terms: </label>Human evolution