@book {,
	title = {The Evolution of Human Societies: From foraging group to agrarian state},
	year = {1987},
	note = {Allen W. Johnson \& Timothy Earle.Includes index.Bibliography: p. [329]-348.},
	pages = {x, 360},
	publisher = {Stanford University Press},
	organization = {Stanford University Press},
	address = {Stanford, Calif.},
	keywords = {Ethnology, Social evolution},
	isbn = {0804713391},
	author = {Johnson, Allen W. and Earle, Timothy K.}
}