@book{64648,
	author = {Bettelheim, Charles and Claudín, Fernando,},
	title = {Las luchas de clases en la URSS  },
	publisher = {Siglo Veintiuno,},
	year = {1979},
	series = {Sociología y política},
	address = {México :},
	edition = {2a ed.},
	note = { }
}