@book{37307,
	author = {Marx, Karl, and Engels, Friedrich,},
	title = {Obras escogidas /},
	publisher = {Editorial Progreso },
	year = {1973-c1976.},
	address = {Moscú },
	note = {Translation of Izbrannye proizvedeniëiìa / K. Marks i F. Engelʹs, Moskva, 1966.}
}