@misc{indiciaeb2c67af1560c,
  title = {A global magnetic anomaly map},
  author = {Regan, R. D. and Davis, W. M. and Cain, J. C.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740012869},
  note = {Source identifier: 19740012869}
}