WALTON, S. G. Oral Vaccine for Prevention of E. Coli Diarrhea in Calves. The Bovine Practitioner, [S. l.], v. 1977, n. 12, p. 117, 1977. DOI: 10.21423/bovine-vol1977no12p117. Disponível em: https://bovine-ojs-tamu.tdl.org/bovine/article/view/2583. Acesso em: 28 jul. 2024.