TY - GEN AU - J R Johler AU - L C Walters AU - C M Lilley C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1958-09-01 04:09:00 DO - https://doi.org/10.6028/NBS.RPT.6002 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1958 TI - Transfer characteristics of radio waves propagated between the ionosphere and the Earth at very low frequencies: ER -