@book{42834,
	author = {Schumpeter , Joseph A and Opie ,  Redvers },
	title = {The Theory Of Economic Development :},
	publisher = {Harvard University Press ,  },
	year = {1955.},
	address = {Cambridge :},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B13-07326.pdf}
}