Spencer, Harbert <br/><br/>
The principles of biology / 
Harbert Spencer 
 - Rev. and enl. ed. 
 - [S.l.] :  [s.n.],  1899 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calcutta University--Calendars
<br/><br/><label>Dewey Class. No.: </label>570.2