Spencer, Herbert. <br/><br/>
The Principles of Biology / 

 - London :  Williams and Norgate,  1884. 
 - 574 p. ;  [?].  23 cm. 
<br/><br/><label>Source: </label>
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>Subjects--Index Terms: </label>Biology. 
<br/><br/><label>Dewey Class. No.: </label>570