@book{1848,
	author = {Campbell, Harry F. and Brown, Richard P. C.},
	title = {Benefit-cost analysis :},
	publisher = {Cambridge University Press,},
	year = {2003.},
	address = {Cambridge, UK ;},
	note = {Includes bibliographical references and index.},
	url = {http://www.loc.gov/catdir/description/cam032/2003043902.html}
}