@book{16109,
	author = {Thacker, P. A.},
	title = {Nontraditional feed sources for use in swine production /},
	publisher = {Butterworths,},
	year = {c1990.},
	address = {Boston :},
	url = {http://www.loc.gov/catdir/enhancements/fy0740/90001588-d.html}
}