TY - CPAPER AU - C. Irwin TI - Creating negative replacements within a closed population for roll-over PRRS elimination T2 - International Symposium on Swine Disease Eradication DP - American Association of Swine Veterinarians DB - AASV Swine Information Library UR - https://www.aasv.org/library/swineinfo/ PY - 2002 DA - 2002/09/15 L1 - https://www.aasv.org/library/swineinfo/Content/ISSDE/2002/009.pdf ER -