“A Comparison of Two Mannheimia Haemolytica Immunization Programs in Feedlot Calves at High Risk of Developing Undifferentiated Fever Bovine Respiratory Disease”. The Bovine Practitioner 42, no. 1 (February 1, 2008): 64–75. Accessed November 22, 2024. https://bovine-ojs-tamu.tdl.org/bovine/article/view/176.