Williams, 2010. Poultry development review, FAO, Roma, Italy Document reference Williams, C. M., 2010. Poultry waste management in developing countries: slaughterhouse wastes. Poultry development review, FAO, Roma, ItalyWeb http://www.fao.org/docrep/013/al716e/al716e00.pdfCitation key Williams, 2010Datasheets Poultry by-product meal
