@misc{indiciae7d8f97984e27,
  title = {IMF changes and polar-cap electric fields and currents},
  author = {Burch, J. L. and Heelis, R. A.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19800040510},
  note = {Source identifier: 19800040510}
}