TY - CPAPER AU - David H. Zeman, DVM, PhD, Dipl. ACVP TI - Concurrent respiratory infections in 221 cases of PRRS virus pneumonia: 1992-1994 T2 - Journal of Swine Health and Production DP - American Association of Swine Veterinarians DB - AASV Swine Information Library UR - https://www.aasv.org/library/swineinfo/ PY - 1996 DA - 1996/01/01 L1 - https://www.aasv.org/library/swineinfo/Content/SHAP/1996/v4n3p143.pdf ER -