TY  - GEN
AU  - F C Breckenridge
C2  - , National Institute of Standards and Technology, Gaithersburg, MD
DA  - 1964-01-01 05:01:00
DO  - https://doi.org/10.6028/NBS.HB.95
LA  - en
PB  - , National Institute of Standards and Technology, Gaithersburg, MD
PY  - 1964
TI  - United States standard for the colors of signal lights:
ER  -