TY - GEN AU - Carlson, Raymond Earl C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1925-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CIRC.276 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1925 TI - Circular of the Bureau of Standards no. 276::motor-vehicle headlighting ER -