@misc{1156101,
  author = {Robert St. Lawrence},
  title = {A method for obtaining the parameters of electron-density profiles from topside ionograms:},
  year = {1965},
  month = {1965-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.TN.315},
  language = {en},
}