@book{177171,
	author = {United Nations.},
	title = {Trends and characteristics of international migration since 1950.},
	publisher = {United Nations,},
	year = {1979.},
	series = {Demographic [i.e. Population] studies ; no. 64},
	address = {New York :},
	note = {"United Nations publication. Sales no. E.78.XIII.5."}
}