TY - GEN AU - Robert W Penn AU - Gregory B McKenna AU - Freddy A Khoury C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1980-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.80-2008 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1980 TI - Physical testing of polymers for use in circulatory assist devices: ER -