@book{149114,
	author = {Sweezy, Paul M. and Bettelheim, Charles.},
	title = {Algunos problemas actuales del socialismo / },
	editor = {Maribel)},
	publisher = {Siglo Veintiuno de España, },
	year = {[1973] (},
	address = {[Madrid] : },
	edition = {[1ª ed.].}
}