TY - GEN AU - Kieffer, L J C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1982-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.250e1982 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1982 TI - Calibration and related measurement services of the National Bureau of Standards: ER -