@book{17848,
	author = {Carson, M. A. and Kirkby, M. J.},
	title = {Hillslope form and process /},
	publisher = {Cambridge University Press,},
	year = {1972.},
	series = {Cambridge geographical studies ;},
	address = {Cambridge :},
	url = {http://www.loc.gov/catdir/enhancements/fy0903/74163061-d.html}
}