TY - CPAPER AU - Daryl Olsen, DVM TI - External Biosecurity Steps to Control PED Spread 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 - 2013 DA - 2013/11/01 L1 - https://www.aasv.org/library/swineinfo/Content/ISU/2013/047.pdf ER -