TY - CPAPER AU - David A. Benfield, Julie Nelson MS, Raymond R. Rowland, Steven R. Lawson, Melissa Steffen, Kurt Rossow, and James E. Collins TI - Persistence of Porcine Reproductive and Respiratory Syndrome Virus T2 - AASV Annual Meeting DP - American Association of Swine Veterinarians DB - AASV Swine Information Library UR - https://www.aasv.org/library/swineinfo/ PY - 1999 DA - 1999/03/02 L1 - https://www.aasv.org/library/swineinfo/Content/AASV/1999/305.PDF ER -