Pfaltzgraff, Robert L., ed. <br/><br/>
Politics and the international system 

 - 2. ed. 
 - New York  Lippincott  1972 
 - 614 p. 
 - Lippincott Series in International Politics .
<br/><br/><label>ISBN: </label>397472188 
<br/><br/><label>Subjects--Topical Terms: </label><br/>RELACIONES INTERNACIONALES<br/>TEORIA<br/>TEORIA POLITICA