@book{31573,
	author = {Marx, Karl and Hobsbawm, Eric J.},
	title = {Formaciones económicas precapitalistas.},
	publisher = {Siglo Veintiuno,},
	year = {2004.},
	series = {Biblioteca del Pensamiento Socialista. Los clásicos},
	address = {México :},
	edition = {21a ed.}
}