@book{89637,
	author = {Puerto Rico. and Bartlett, Frederick P.},
	title = {Puerto Rico y su problema de población},
	publisher = {Junta de Planificación},
	year = {1946.},
	series = {[Inf. tec. no. 2]},
	address = {Santurce, P.R.},
	note = {Includes explanatory notes.}
}