Spencer, Herbert <br/><br/>
First principles. 

 - London :  Williams and Norgate,  1908. 
 - 492 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CIENCIAS SOCIALES
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>CIENCIAS SOCIALES