@misc{indiciaec0d4c232c59f,
  title = {Electron echo experiment - A new magnetospheric probe},
  author = {Hendrickson, R. A. and Mcentire, R. W. and Winckler, J. R.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710046977},
  note = {Source identifier: 19710046977}
}