@book{138922,
	author = {Layard, P. R. G.},
	title = {Cost-benefit analysis /},
	publisher = {Cambridge University Press,},
	year = {1994.},
	address = {Cambridge [England] ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/description/cam026/93037740.html}
}