@inbook {,
	title = {Exchange systems and the spatial distribution of elites: the organization of stratification in agrarian societies},
	booktitle = {Regional analysis, Volume 2, Social Systems},
	year = {1976},
	note = {edited by Carol A. Smith.ill. ; 24 cm.1. Economic systems.--v. 2. Social systems.},
	pages = {309{\textendash}374},
	publisher = {Academic Press},
	organization = {Academic Press},
	address = {New York},
	keywords = {Central places., Developing countries Commerce., Regional economics., Social systems Economic aspects.},
	isbn = {0126521018 (v. 1)},
	author = {Smith, Carol A.},
	editor = {Smith, Carol A.}
}