@book{62919,
	author = {Wonnacott, Ronald J. and Wonnacott, Thomas H.},
	title = {Econometrics /},
	publisher = {John Wiley,},
	year = {c1979.},
	series = {Wiley series in probability and mathematical statistics ;},
	address = {New York :},
	edition = {2nd ed.}
}