Spencer, Charles S <br/><br/>
Territorial expansion and primary state formation.  [electronic resource] 

 -  Proceedings of the National Academy of Sciences of the United States of America  Apr 2010 
 - 7119-26 p.  digital 
<br/><br/> Publication Type: Historical Article; Journal Article; Research Support, U.S. Gov't, Non-P.H.S. 
<br/><br/><label>ISSN: </label>1091-6490 
<br/><br/><label>Standard No.: </label>10.1073/pnas.1002470107  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Anthropology--methods<br/>Behavior<br/>China<br/>Egypt, Ancient<br/>Geography<br/>Government<br/>History, Ancient<br/>Humans<br/>Mexico<br/>Peru<br/>Politics<br/>Territoriality