@book{36210,
	author = {United Nations.},
	title = {Methods for population projections by sex and age /},
	publisher = {United Nations,},
	year = {1956.},
	series = {U.N. Population studies no.25 : Manuals on methods of estimating population, manual III},
	address = {New York :},
	note = {U.N. [Document] ST/SOA/Series A/25.}
}