TY - GEN AU - DJ Brown AU - LR Wescott AU - J W Wright C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1959-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.TN.40-8 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1959 TI - Mean electron density variations of the quiet ionosphere no. 8: ER -