@book{42799,
	author = {Wonnacott, Paul. and Wonnacott, Ronald J.},
	title = {An introduction to microeconomics /},
	publisher = {McGraw-Hill,},
	year = {c1979.},
	address = {New York :},
	note = {Chapters 1-6 and 7-23 of the authors' Economics.}
}