TY  - GEN
AU  - Breckenridge, F C
C2  - , National Institute of Standards and Technology, Gaithersburg, MD
DA  - 1959-01-01 05:01:00
DO  - https://doi.org/10.6028/NBS.RPT.6413
LA  - en
PB  - , National Institute of Standards and Technology, Gaithersburg, MD
PY  - 1959
TI  - Background and objectives of the U.S. Standard for the colors of signal lights:
ER  -