@book{3070,
	author = {Hanley, Nick. and Shogren, Jason F.},
	title = {Introduction to environmental economics. /},
	publisher = {Oxford University Press,},
	year = {2001.},
	address = {New York :},
	url = {http://www.loc.gov/catdir/enhancements/fy0612/2001021265-t.html}
}