1. Rosenquist BD. Viruses as etiologic agents of bovine respiratory disease. In: Loan RW, ed. Bovine respiratory disease a symposium. College Station, Tex: Texas A&M University Press, 1984;363-376.
2. Frank GH. Bacteria as etiologic agents in bovine respiratory disease. In: Loan RW, ed. Bovine respiratory disease a symposium. College Station, Tex: Texas A&M University Press, 1984;347-362.