@book{177163,
	author = {Mortara, Giorgio,},
	title = {Methods of using census statistics for the calculation of life tables and other demographic measures :},
	publisher = {United Nations, Dept. of Social Affairs,},
	year = {1949.},
	series = {Population studies ;},
	address = {Lake Success, N.Y. :},
	note = {United Nations publications sales no.: 1950. XIII. 3.}
}