@book{227,
	author = {Lipsey, Richard G., and Courant, Paul N.},
	title = {Macroeconomics.},
	publisher = {Addison Wesley,},
	year = {c1999.},
	address = {Reading, Mass. :},
	edition = {12th ed. /},
	note = {Supplementary materials to accompany the text are available to aid students.}
}