@book{4444,
	author = {Brus, Wlodzimierz},
	title = {Economía política en el socialismo},
	publisher = {Amorrortu Editores},
	year = {1973},
	address = {Buenos Aires :},
	url = {https://biblioeco.unsa.edu.ar/pmb/images/libros/L127648.jpg}
}