TY - GEN AU - Robert St. Lawrence C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1965-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.TN.315 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1965 TI - A method for obtaining the parameters of electron-density profiles from topside ionograms: ER -