TY - CPAPER AU - J.C.S. Harding, DVM, MSc TI - The economics of preventing disease introduction T2 - Allen D. Leman Swine Conference DP - American Association of Swine Veterinarians DB - AASV Swine Information Library UR - https://www.aasv.org/library/swineinfo/ PY - 1999 DA - 1999/09/01 L1 - https://www.aasv.org/library/swineinfo/Content/LEMAN/1999/185.PDF ER -