@book{160468,
	author = {Duverger, Maurice and Tierno Galván, Enrique, },
	title = {Métodos de las ciencias sociales },
	publisher = {Ariel,  },
	year = {1999},
	series = {Demos. Biblioteca de Ciencia Politica},
	address = {México :},
	edition = {1a ed. },
	note = {Incluye índice }
}