@book{6117,
	title = {The Sex and age distributions of population : the 1990 revision of the United Nations global population estimates and projections },
	publisher = {United Nations},
	year = {1991 },
	address = {New York},
	note = {Department of International Economic and Social Affairs 391 p. ; 28 cm. "ST/ESA/SER.A/122." p. 391 NHAH }
}