@misc{indiciae7cc6c5f05c46,
  title = {Magnetic field directional discontinuities. 1: Minimum variance errors},
  author = {Lepping, R. P. and Behannon, K. W.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19790022945},
  note = {Source identifier: 19790022945}
}