@book{2007,
	author = {Schwab, Glenn O. and Fangmeier, Delmar D.},
	title = {Soil and Water Management Systems /},
	publisher = {Wiley,},
	year = {1995.},
	address = {[S.l.] :},
	edition = {4th ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0471109738/chopaconline-20}
}