TY - GEN AU - Marshall, J L C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1998-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.SP.250e1998 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1998 TI - NIST calibration services users guide 1998: ER -