@misc{indiciae1993bf59b4ef,
  title = {Ionosphere electron temperature measurements and their implications},
  author = {Brace, L. H. and Carignan, G. R. and Spencer, N. W.},
  year = {1963},
  url = {https://ntrs.nasa.gov/citations/19660022734},
  note = {Source identifier: 19660022734}
}