@book{49628,
	author = {Levy, Hermann},
	title = {Monopoly and competition /},
	publisher = {Macmillan and co, limited,},
	year = {1911.},
	address = {London :},
	note = {Includes index.},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B13-08534.pdf}
}