Bagley, C.V., Bingham, H.R. and Hall, J.O. 2003. The Association Between Serum Mineral and Vitamin A and E Concentration and Respiratory Disease in Beef Calves Entering Backgrounding Lots. The Bovine Practitioner. 37, 1 (Feb. 2003), 68–73. DOI:https://doi.org/10.21423/bovine-vol37no1p68-73.