@misc{indiciaec20014984a1c,
  title = {A synoptic view of ionic constitution above the F-layer maximum},
  author = {Boyd, R. L. F. and Laflin, S. and Raitt, R. J.},
  year = {1965},
  url = {https://ntrs.nasa.gov/citations/19660028669},
  note = {Source identifier: 19660028669}
}