@book{2669,
	author = {Ritter, Dale F. and Kochel, R. Craig.},
	title = {Process geomorphology.},
	publisher = {McGraw-Hill,},
	year = {c2002.},
	address = {Boston :},
	edition = {4th ed. /},
	url = {http://www.loc.gov/catdir/toc/mh041/2001031509.html}
}