TY - GEN AU - Zong, Yuqin AU - Nadal, Maria E AU - Tsai, Benjamin K AU - Miller, C Cameron C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2018-07-01 04:07:00 DO - https://doi.org/10.6028/NIST.SP.250-95 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2018 TI - NIST measurement services: photometric calibrations: ER -