@book {,
	title = {Origins of the State and Civilization: The process of cultural evolution},
	year = {1975},
	note = {Elman R. Service.map ; 21 cm.Includes index.},
	pages = {361},
	publisher = {Norton},
	organization = {Norton},
	edition = {1st},
	address = {New York},
	keywords = {Civilization History., Political anthropology., Social evolution.},
	isbn = {0393055477. (pbk.)039309},
	author = {Service, Elman R.}
}