@misc{indiciaeb8051f44c9b9,
  title = {Error enhancement in geomagnetic models derived from scalar data},
  author = {Stern, D. P. and Bredekamp, J. H.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740009004},
  note = {Source identifier: 19740009004}
}