Spencer, Herbert,  1820-1903. <br/><br/>
First principles / 
by Herbert Spencer. 
 - 6th and final edition 
 - London :  Watts & Co.,  1946. 
 - 539 p. ;  16 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Philosophy, Modern
<br/><br/><label>LC Class. No.: </label>SPE-B 02892