“ATROPHY OF THE BURSA FABRICIUS IN THE INCIDENCE OF MULTIPLE INFECTIONS BY AVIAN INFLUENZA AND NEWCASTLE DISEASE VIRUS IN FREE-RANGE CHICKEN”. Buletin Veteriner Udayana 16, no. 4 (July 31, 2024): 1316–1329. Accessed September 20, 2026. https://ejournal3.unud.ac.id/index.php/buletinvet/article/view/365.