Analysis of Mastitis Cases on Modern Dairy Farms in Blitar Regency, Indonesia Lili Zalizar, Listiari Hendraningsih, Asmah Hidayati, Sutawi Sutawi, Wijayanto Wijayanto, Dewi Mariyam, Irma Rahmaita Utarid, Rachmad Dharmawan and Abubakar Yaro E3S Web Conf., 432 (2023) 00018 Published online: 05 October 2023 DOI: 10.1051/e3sconf/202343200018