@book{4443,
	author = {Dagum, Camilo and Bee de Dagum, Estela María},
	title = {Introducción a la econometría},
	publisher = {Siglo Veintiuno editores},
	year = {1971},
	address = {México :},
	url = {https://biblioeco.unsa.edu.ar/pmb/images/libros/L127647.jpg}
}