@book{59908,
	author = {Alderfer, E. B. and Michl, H. E.},
	title = {Economics Of  American Industry /},
	publisher = {Mcgraw-hili, Book Company, Inc,},
	year = {1950.},
	address = {New York :},
	edition = {Second Edition},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B13-07765.pdf}
}