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Mansfield, M.E., Crandell, R.A. and Woods, G.T. 1978. The Effect of intranasal IBR-PI3 vaccination of feeder cattle on arrival at a feedlot compared with vaccination at the start of an outbreak of acute respiratory tract disease. The Bovine Practitioner. 1978, 13 (Nov. 1978), 83–87. DOI:https://doi.org/10.21423/bovine-vol1978no13p83-87.