TY - GEN AU - Gary Kramer AU - John Travis AU - C Faison C2 - Handbook (NIST HB), National Institute of Standards and Technology, Gaithersburg, MD DA - 2000-02-26 LA - en PB - Handbook (NIST HB), National Institute of Standards and Technology, Gaithersburg, MD PY - 2000 TI - NIST Handbook 150-21 National Voluntary Laboratory Accreditation Program Chemical Calibration Certifiers of Spectrophotometric NTRMs UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=905667 ER -