Guthrie, C. A., K. C. Rogers, R. A. Christmas, G. J. Vogel, S. B. Laudert, and G. D. Mechor. “Efficacy of Metaphylactic Tilmicosin for Controlling Bovine Respiratory Disease in High-Risk Northern Feeder Calves”. The Bovine Practitioner, vol. 38, no. 1, Feb. 2004, pp. 46-53, doi:10.21423/bovine-vol38no1p46-53.