Gibson, Jeffry Royle. <br/><br/>
A demographic analysis of urbanization  :   evolution of a system of cities in Honduras, El Salvador, and Costa Rica. /  

 - ithaca, n.y. :  Cornell University  1970. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SOCIOLOGIA URBANA<br/>URBANIZACION--AMERICA CENTRAL.