@book{11122,
	author = {Willis, K. G.},
	title = {Environmental valuation :},
	publisher = {CAB International,},
	year = {c1995.},
	address = {Wallingford, Oxon, UK :},
	url = {http://www.loc.gov/catdir/enhancements/fy0605/96142277-d.html}
}