@book{57209,
	author = { Rogin, Leo},
	title = {The Meaning And Validity Of Economic Theory :},
	publisher = {Harper & Brothers Publishers, },
	year = {1956.},
	address = {New York :},
	note = {Includes index.},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B13-09356.pdf}
}