@book{11713,
	author = { Zaid, Gabriel},
	title = {El progreso improductivo},
	publisher = {Siglo XXI },
	year = {1979},
	series = { Economía y demografía},
	address = { México},
	note = {Reimpresiones: (2a, 1979) -- (3a, 1981) -- (4a, 1984) -- (5a, 1987)}
}