@book{35970,
	author = {Unger, Paul W., ed.},
	title = {Managing agricultural residues /},
	publisher = {Lewis Publishers,},
	year = {c1994.},
	address = {Boca Raton :},
	url = {http://www.loc.gov/catdir/enhancements/fy0744/93034240-d.html}
}