@book{177480,
	author = {United Nations/UNFPA Expert Group Meeting on Population and Development Modelling and United Nations.},
	title = {Population and development modelling :},
	publisher = {United Nations,},
	year = {1981.},
	series = {Population studies / Department of International Economic and Social Affairs ;},
	address = {New York :},
	note = {"ST/ESA/SER.A/73."}
}