@book{996,
	author = {Baumol, William J. and Oates, Wallace E.},
	title = {The theory of environmental policy /},
	publisher = {Cambridge University Press,},
	year = {1988.},
	address = {Cambridge [Cambridgeshire] ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/description/cam023/87024975.html}
}