@book{70444,
	author = {Kimball, Dexter S. and Kimball, Dexter Simpson,},
	title = {Principles of industrial organization /},
	publisher = {Macgraw-Hill, },
	year = {1947.},
	series = {McGraw-Hill industrial organization and management series},
	address = {New York :},
	edition = {6th ed.}
}