TY - GEN 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.4542 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1956 TI - Candlepower distribution and color characteristics of a double obstruction light: ER -