@misc{indiciae186bb76b12ac,
  title = {Polar cap electron acceleration regions},
  author = {Burch, J. L. and Fields, S. A. and Heelis, R. A.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19800026366},
  note = {Source identifier: 19800026366}
}