@book{4418,
	author = {Schwab, Glenn Orville,},
	title = {Soil and water conservation engineering /},
	publisher = {Wiley,},
	year = {c1981.},
	address = {New York :},
	edition = {3d ed.},
	note = {Previous 2 editions published in 1955 and 1966 entered under R. K. Frevert.},
	url = {http://www.loc.gov/catdir/enhancements/fy0607/80027961-d.html}
}