TY  - RPRT
TI  - Optical radiation measurements : the present state of radiometry and photometry
AU  - Steiner, Bruce
PY  - 1974
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 594-6
DO  - 10.6028/NBS.TN.594-6
ER  -