@book{810,
	author = {Callan, Scott, and Thomas, Janet M.,},
	title = {Environmental economics & management :},
	year = {c2013.},
	address = {Australia :},
	edition = {6th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy1307/2012935809-b.html}
}