TY - CPAPER AU - Ken Platt TI - PRRS Virus—Genetic Variation and Vaccine Selection T2 - ISU Swine Disease Conference for Swine Practitioners DP - American Association of Swine Veterinarians DB - AASV Swine Information Library UR - https://www.aasv.org/library/swineinfo/ PY - 1999 DA - 1999/11/01 L1 - https://www.aasv.org/library/swineinfo/Content/ISU/1999/073.PDF ER -