O'Brien, Robert William  1907 <br/><br/>
Readings in general sociology 

 - 3th. ed. 
 - Boston :   Houghton Mifflin Co.,   1964. 
 - xii, 526 p. :   il.; gráf.s; maps; tablas ;   26 cm. 
<br/><br/> Bibliographical notes pp. 513-518 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SOCIOLOGIA