WALKER, E. A. New import center and semen imports: Steps in improving U.S. herds. The Bovine Practitioner, [S. l.], v. 1973, n. 8, p. 64–66, 1973. DOI: 10.21423/bovine-vol1973no8p64-66. Disponível em: https://bovine-ojs-tamu.tdl.org/bovine/article/view/1829. Acesso em: 12 aug. 2024.