@book{35262,
	author = {Vinogradoff, Paul, and Vinogradoff, Paul.},
	title = {Normas sociales y normas jurídicas /},
	publisher = {FCE },
	year = {1997.},
	series = {Fondo 2000.},
	address = {México },
	note = {"Fragmento de Introducción al derecho"}
}