@misc{indiciae7c579bb60ff5,
  title = {Ionospheric electron-density profiles with continuous gradients and underlying ionization corrections. II.},
  author = {Howe, H. H. and Mckinnis, D. E.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19680029525},
  note = {Source identifier: 19680029525}
}