Janzen, E. D., and R. F. McManus. “Observations on the Use of a Long-Acting Oxytetracycline for in-Contact Prophylaxis of Undifferentiated Bovine Respiratory Disease in Feedlot Steers under Canadian Conditions”. The Bovine Practitioner 1980, no. 15 (November 1, 1980): 87–90. Accessed July 14, 2024. https://bovine-ojs-tamu.tdl.org/bovine/article/view/1925.