@misc{indiciaed109fef36307,
  title = {Equivalent source modeling of the main field using MAGSAT data},
  author = {Mayhew, M. A. and Estes, R. H.},
  year = {1982},
  url = {https://ntrs.nasa.gov/citations/19830006330},
  note = {Source identifier: 19830006330}
}