@book{219217,
	author = {UN. Population Division},
	title = {Population ageing and development},
	publisher = {UN},
	year = {Dec. 2009},
	series = {Population studies},
	address = {[New York]},
	note = {At head of title: United Nations, Department of Economic & Social Affairs, Population Division.},
	url = {http://www.un.org/esa/population/ageing/ageing2009chart.pdf}
}