Confer, A.W., Buening, G.M., Espe, B.H. and Smith, R.A. 1983. Antibody responses of heifers vaccinated with reduced doses of Brucella abortus strain 19. The Bovine Practitioner. 1983, 18 (Nov. 1983), 174–178. DOI:https://doi.org/10.21423/bovine-vol1983no18p174-178.