1. ALDERS, R. and SPRADBROW, P. (2001) Controlling Newcastle disease in village chickens. A field manual. FAO http://www.fao.org/ag/againfo/subjects/en/infpd/documents/manuals/ND.pdf.
2. ALL COUNTRY REPORTS (CR) quoted (and others) can be found under DAD-IS http://www.fao.org/dad-is, click State of the World, countries progress.