@misc{indiciaea50bfe2d4345,
  title = {Columnar electron content up to the plasmasphere},
  author = {Almeida, O. G. and Da Rosa, A. V.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19710038309},
  note = {Source identifier: 19710038309}
}