Pertiwi, V.R. et al. 2026. EVALUATION OF PROTECTIVE ANTIBODY LEVELS IN LAYING HENS FOLLOWING VACCINATION AGAINST AVIAN INFLUENZA, INFECTIOUS BRONCHITIS, AND NEWCASTLE DISEASE. Buletin Veteriner Udayana. 18, 2 (May 2026), 347–363. DOI:https://doi.org/10.24843/bulvet.2026.v18.i02.p01.