@misc{indiciae45f19dff5028,
  title = {AUTOMATIC MAPPING OF THE GEOMAGNETIC FIELD},
  author = {Cain, J. C. and Neilon, J. R.},
  year = {1963},
  url = {https://ntrs.nasa.gov/citations/19630025346},
  note = {Source identifier: 19630025346}
}