@misc{indiciae71dccd7977a0,
  title = {Ion composition during the formation of a midlatitude E sub S layer},
  author = {Aikin, A. C. and Goldberg, R. A. and Azcarraga, A.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730018586},
  note = {Source identifier: 19730018586}
}