@misc{indiciae7202767e8911,
  title = {An updated Bouguer anomaly map of south-central West Africa},
  author = {David A. Hastings},
  year = {1983},
  doi = {10.1190/1.1441534},
  url = {https://pubs.usgs.gov/publication/70140580},
  note = {Source identifier: 70140580}
}