@book{48809,
	author = {Spring, P.,},
	title = {Gaining the edge in pork and poultry production :},
	publisher = {Brill | Wageningen Academic,},
	year = {2007.},
	address = {Leiden ;},
	url = {http://dx.doi.org/10.3920/978-90-8686-595-6}
}