@book{95883,
	author = {Hatt, Paul K.},
	title = {Backgrounds of human fertility in Puerto Rico : a sociological survey / Paul K. Hatt},
	publisher = {Princeton University Press},
	year = {1952.},
	address = {Princeton,},
	note = {"Prepared under the joint auspices of the Social Science Research Center of the University of Puerto Rico and the Office of Population Research of Princeton University."}
}