@book{4138,
	author = {Halbwachs, Maurice and Aub, Max,  trad.},
	title = {Las Clases sociales},
	publisher = {Fondo de Cultura Económica,},
	year = {1950, reimp. 1978},
	address = {México:},
	edition = {1a. ed.  5o. reimp}
}