@book{175876,
	author = {Interregional Workshop on Methodology of Demographic Sample Surveys,},
	title = {Methodology of demographic sample surveys :},
	publisher = {United Nations,},
	year = {1971.},
	series = {[United Nations. Document] ST/STAT/Ser. M/51; ST/TAO/Ser.C/119},
	address = {New York,},
	note = {"United Nations publication. Sales no.: E.71.XVII.11."}
}