TY - GEN AU - Robert W Penn AU - Gregory B McKenna C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1978-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.79-1741 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1978 TI - Physical testing of polymers for use in circulatory assist devices ::first annual report July 1978 ER -