@misc{1157196,
  author = {Wynne Calvert},
  title = {Equatorial spread F.:},
  year = {1962},
  month = {1962-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.TN.145},
  language = {en},
}