TY - GEN AU - Simeroth, John W AU - Carrothers, Morton R C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1957-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.RPT.5466 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1957 TI - Field tests of runway distance markers: ER -