TY  - RPRT
TI  - Spectral radiance calibrations 
AU  - Walker, James H
AU  - Saunders, Robert D
AU  - Hattenburg, Albert T
PY  - 1987
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS SP 250-1
DO  - 10.6028/NBS.SP.250-1
ER  -