@book{1041,
	author = {Sumner, M. E.},
	title = {Handbook of soil science /},
	publisher = {CRC Press,},
	year = {c2000.},
	address = {Boca Raton, Fla :},
	url = {http://www.loc.gov/catdir/enhancements/fy0731/99029646-d.html}
}