@misc{indiciae570dc08f9db4,
  title = {Long-term variations of the primary cosmic-ray electron component.},
  author = {Dev Verma, S. and L'Heureux, J. and Meyer, P. and Vogt, R.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680060545},
  note = {Source identifier: 19680060545}
}