@book{57309,
	author = {Malthus, Robert},
	title = {Principles of Political Economy /},
	publisher = {The International Economic Circle,},
	year = {1936.},
	address = {London :},
	note = {index included},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B13-04802.pdf}
}