TY - GEN AU - Norton, Kenneth A C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1947-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CRPL.4-2 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1947 TI - The technical factors involved in the choice of a carrier frequency for a world-wide low frequency loran system: ER -