@book{9503,
	author = {Levin, R. I. and Lamone, R. P. and Lamone, R. P. ; jt. auth.},
	title = {Linear programming for management decisions},
	publisher = {Richard D. Irwin},
	year = {1969},
	series = {Irwin series in Quatitative analysis for business},
	address = {Homewood}
}