Bagnol B, Alders R G, Costa R, Lauchande C, Monteiro J, Msami H, Mgomezulu R, Zandamela A and Young M 2013:
Contributing factors for successful vaccination campaigns against Newcastle disease.
Livestock Research for Rural Development. Volume 25, Article #95.
Retrieved
, from http://www.lrrd.org/lrrd25/6/bagn25095.htm