@book{96575,
	author = {Malthus, Thomas Robert. and Keynes, John Maynard (},
	title = {Primer ensayo sobre la población / },
	publisher = {Alianza Editorial, },
	year = {1979.},
	series = {El libro de bolsillo. Clásicos ; },
	address = {Madrid : },
	edition = {4ª ed.}
}