@misc{indiciae4f57cacacf72,
  title = {Approaches to ionospheric modelling, simulation and prediction},
  author = {Schunk, R. W. and Sojka, J. J.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920037294},
  note = {Source identifier: 19920037294}
}