@misc{indiciaeb7643d3150ec,
  title = {Magnetospheric substorms observed at the synchronous orbit.},
  author = {Barfield, J. N. and Coleman, P. J., Jr. and Cummings, W. D.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690033236},
  note = {Source identifier: 19690033236}
}