Darwin, Charles Robert, <br/><br/>
The origin of species by means of natural selection.  The descent of man and selection in relation to sex. 

 - Chicago  Encyclopædia Britannica  1952. 
 - x, 659 p.  illus. 
 - Great books of the western world  v. 49 .
<br/><br/>Bibliographical footnotes. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evolution<br/>Man--Origin.<br/>Heredity<br/>Natural selection