2005. Study Of Chick Embryo Vaccination Against Newcastle And Newcastle With Gumboro: Abdel Ameer H.Zahid , Nawal Salih Jafer , Anton S.AL- Bana. The Iraqi Journal of Veterinary Medicine. 29, 2 (Dec. 2005), 81–92. DOI:https://doi.org/10.30539/iraqijvm.v29i2.855.