TY  - RPRT
TI  - NIST measurement services: photometric calibrations 
AU  - Zong, Yuqin
AU  - Nadal, Maria E
AU  - Tsai, Benjamin K
AU  - Miller, C Cameron
PY  - 2018
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST SP 250-95
DO  - 10.6028/NIST.SP.250-95
ER  -