@book{43227,
	author = {Zaid, Gabriel.},
	title = {El progreso improductivo /},
	publisher = {Siglo Veintiuno Editores,},
	year = {1979.},
	series = {Economía y demografía},
	address = {México, D.F. :},
	edition = {2a ed.},
	note = {Includes indexes.}
}