@book{9409,
	author = {Levin, Richard I. and Lamone, Rudolph P.,},
	title = {Linear programming for management decisions /},
	publisher = {R. D. Irwin,},
	year = {1969.},
	series = {Irwin series in quantitative analysis for business},
	address = {Homewood :},
	note = {Includes index.}
}