TY  - GEN
AU  - Breckenridge, F C
AU  - Vaughan, Robert T
C2  - , National Institute of Standards and Technology, Gaithersburg, MD
DA  - 1956-01-01 05:01:00
DO  - https://doi.org/10.6028/NBS.RPT.4659
LA  - en
PB  - , National Institute of Standards and Technology, Gaithersburg, MD
PY  - 1956
TI  - Visual ranges of four obstruction lights:
ER  -