TY  - RPRT
TI  - A national measurement system for radiometry, photometry, and pyrometry based upon absolute detectors 
AU  - Parr, A C
PY  - 1996
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 1421
DO  - 10.6028/NIST.TN.1421
ER  -