@book{5941,
	author = {Lipsey, Richard G., and Chrystal, K. Alec,},
	title = {Principles  of economics /},
	publisher = {Oxford University Press,},
	year = {1999},
	address = {Oxford ;},
	edition = {9th ed.},
	note = {Various multi-media instructional aids are available to supplement the text.}
}