@book{18213,
	author = {Malthus, Thomas Robert},
	title = {Primer ensayo sobre la población},
	publisher = {Alianza Editorial},
	year = {1970.},
	series = {El libro de bolsillo. Sección : Clásicos},
	address = {Madrid},
	edition = {3. ed.},
	note = {Translation of : Anessay on the principles of population.}
}