Darwin, Charles. <br/><br/>
The origin of species  : a variorum text 

 - Philadelphia ; University of Pennsylvania,  1959 
 - 816 p. 
<br/><br/><label>LCCN: </label>70759 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Especies--Origen de las.<br/>Evolución.<br/>Hombre--Origen.<br/>Vida--Origen.
<br/><br/><label>Dewey Class. No.: </label>575  / D3