Santosa PE, Sutrisna R. Antibody titre avian influenza and Newcastle Disease in blood serum of growing ducks Gived Defferent Crude Protein Ration and vaccinated with Vaksimune NDL AI®. JPPT [Internet]. 2017 Apr. 3 [cited 2026 Sep. 17];17(1). Available from: https://jurnal.polinela.ac.id/index.php/jppt/article/view/3