@book{30579,
	author = {Sweezy, Paul Marlar and Bettelheim, Charles.},
	title = {Algunos problemas actuales del socialismo},
	publisher = {Siglo Veintiuno Editores},
	year = {c1976.},
	address = {México},
	edition = {4. ed.},
	note = {Translation of : Letters on the transition to socialism.}
}