@book{29316,
	author = {Owen, Oliver S., and Chiras, Daniel D.},
	title = {Natural resource conservation :},
	publisher = {Prentice Hall,},
	year = {1998.},
	address = {Upper Saddle River, NJ :},
	edition = {7th ed.},
	url = {http://www.loc.gov/catdir/toc/fy0713/97007765.html}
}