@misc{indiciaec321e293306b,
  title = {Polar charts for calculating aeromagnetic anomalies of three-dimensional bodies},
  author = {Roland George Henderson and Alphonso Wilson},
  year = {1964},
  doi = {10.3133/ofr6476},
  url = {https://pubs.usgs.gov/publication/ofr6476},
  note = {Source identifier: ofr6476}
}