@book{17923,
	author = {Thornes, John B.},
	title = {Vegetation and erosion :},
	publisher = {J. Wiley,},
	year = {c1990.},
	address = {Chichester, West Sussex, England ;},
	url = {http://www.loc.gov/catdir/toc/onix04/89025010.html}
}