@book {2292,
	title = {Exploring the Racial Gap in Infant Mortality Rates, 1920-1970},
	series = {NBER working paper series},
	number = {no. 8836},
	year = {2002},
	pages = {55},
	publisher = {National Bureau of Economic Research},
	organization = {National Bureau of Economic Research},
	address = {Cambridge, MA},
	author = {William J Collins and Melissa A Thomasson}
}
