@book{49854,
	author = {Hagen, Everett Einar, and Massachusetts Institute of Technology.},
	title = {On the theory of social change},
	publisher = {Dorsey Press},
	year = {1962.},
	series = {The Dorsey series in anthropology and sociology},
	address = {Homewood, Ill.},
	note = {920527}
}