Studi Histopatologi Limpa dan Bursa Fabricious Ayam Berpenyakit Tetelo (Newcastle Disease) pada Kasus Lapang (HISTOPATHOLOGY STUDIES ON SPLEEN AND BURSA OF FABRICIUS OF NEWCASTLE DISEASE CHICKHENS FROM FIELD CASE) - Etriwati, Etriwati (Faculty of Veterinary Medicine, Udayana University and Published in collaboration with the Indonesia Veterinarian Association, 2018)