@book{67519,
	author = {Tietenberg, Thomas. and Lewis, Lynne.},
	title = {Environmental & natural resource economics /},
	publisher = {Pearson Education,},
	year = {c2012.},
	series = {Pearson series in economics},
	address = {Upper Saddle River, N.J. :},
	edition = {9th ed.}
}