@misc{indiciaeb114300b74f0,
  title = {The lower ionosphere at solar minimum},
  author = {Aikin, A. C. and Bourdeau, R. E. and Donley, J. L.},
  year = {1965},
  url = {https://ntrs.nasa.gov/citations/19660001925},
  note = {Source identifier: 19660001925}
}