@book{37299,
	author = {Harnecker, Marta and Althusser, Louis},
	title = {Los conceptos elementales del materialismo histórico/},
	publisher = { : Siglo XXI Editores},
	year = {, 1975},
	series = {Estudios de historia contemporánea},
	address = {Madrid},
	edition = {28¯ ed.}
}