TY - GEN AU - Taylor, Barry C2 - - 1991, National Institute of Standards and Technology, Gaithersburg, MD DA - 1991-01-01 DO - https://doi.org/10.6028/NIST.SP.330e1991 LA - en PB - - 1991, National Institute of Standards and Technology, Gaithersburg, MD PY - 1991 TI - The International System of Units (SI) 1991 edition ER -