TY  - RPRT
TI  - Comparative table chromaticity requirements of U.S. and international specifications and standards for aviation signal light colors 
AU  - Breckenridge, F C
PY  - 1956
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS report ; 4456
DO  - 10.6028/NBS.RPT.4456
ER  -