@book{29493,
	author = {Pierce, F. J.},
	title = {Advances in soil and water conservation /},
	publisher = {Ann Arbor Press,},
	year = {c1998.},
	address = {Chelsea, MI :},
	url = {http://www.loc.gov/catdir/enhancements/fy0744/97051557-d.html}
}