@book{177616,
	author = {United Nations. and United Nations},
	title = {Population newsletter :},
	publisher = {United nations,},
	year = {1975. },
	series = {Population Studies / United Nations. Dept. of Economic and Social Affairs ;},
	address = {New York :},
	note = {United Nations. Document ST/SOA/Ser. A/31.}
}