@book{26766,
	author = {Malthus, Thomas Robert and Keynes, John Maynard},
	title = {Primer ensayo sobre la población.},
	publisher = {Alianza,},
	year = {1993.},
	address = {Madrid :},
	note = {Prólogo de John Maynard Keynes "Robert Malthus (1766-1834):El primer economista de Cambridge".}
}