@book{23658,
	author = {Havemann, Robert.},
	title = {La libertad como necesidad :},
	publisher = {Editorial Laia,},
	year = {1979.},
	series = {Laia B ;},
	address = {Barcelona :},
	edition = {1a ed. española.},
	note = {Contains essays which were chiefly published in 1973-1976.}
}