@misc{indiciae7f0585952d08,
  title = {Positive ions and the winter anomaly.},
  author = {Mitchell, J. D. and Hale, L. C. and Olsen, R. O. and Randhawa, J. and Rubio, R.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720038707},
  note = {Source identifier: 19720038707}
}