TY - GEN AU - Kramer, Gary W AU - Travis, John C AU - Faison, C Douglas AU - Rasberry, Stanley D C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2000-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.HB.150-21 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2000 TI - National voluntary laboratory accreditation program: chemical calibration certifiers of spectrophotometric NTRMs: ER -