Molecular characterisation of Newcastle disease and infectious disease viruses - Mohd Yusoff, Khatijah; Ideris, Aini; Ali, Abdul Manaf; Sipat, Abdullah; Omar, A. R.; Mohd Lila, Mohd Azmi; Arshad, Siti Suri; Mohamed, Maizan (The Research Unit, Universiti Putra Malaysia, 1999)