@misc{indiciae0db25535769c,
  title = {Transionospheric propagation predictions},
  author = {Klobucher, J. A. and Basu, S. and Bernhardt, P. A. and Davies, K. and Donatelli, D. E. and Fremouw, E. J. and Goodman, J. M. and Hartmann, G. K. and Leitinger, R.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19800016202},
  note = {Source identifier: 19800016202}
}