Willey, Gordon Randolph, <br/><br/>
Horizonal integration and regional diversity :  an alternating process in the rise of civilizations 

 -  1991 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Diversidad cultural<br/>Sociedades complejas<br/>Culturas precolombinas
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Perú<br/>America Central