Venter, B.J. 1985. The Presence and Persistence of Transmissible Drug Resistance Factors in the Coliform Intestinal Flora of Calves Reared in an Intensive System. The Bovine Practitioner. 1985, 20 (Nov. 1985), 79–81. DOI:https://doi.org/10.21423/bovine-vol1985no20p79-81.