TY - CPAPER AU - Armstrong TA, Kremer BT, Marsteller TA, et al TI - Effects of ractopamine step-up use programs on finishing pigs fed under commercial conditions T2 - Journal of Swine Health and Production DP - American Association of Swine Veterinarians DB - AASV Swine Information Library UR - https://www.aasv.org/library/swineinfo/ PY - 2005 DA - 2005/03/01 L1 - https://www.aasv.org/library/swineinfo/Content/SHAP/2005/v13n2p66.pdf SE - Mar-Apr ER -