@book{72672,
	author = {Hulley, Stephen and Cummings, Steven R.},
	title = {Diseño de la investigacion clinica : un enfoque epidemiologico},
	publisher = {Doyma,},
	year = {1993.},
	address = {Barcelona :},
	note = {Compra: Distribuna Ltda, 18-04-94, Fondo FAU FNSP, $68700.00; ej2 Compra Distribuna FAU. $34.300., Sept/94.}
}