@misc{indiciaeb42c0ecf44de,
  title = {Assessment of the undiscovered oil and gas of the Senegal province, Mauritania, Senegal, the Gambia, and Guinea-Bissau, northwest Africa},
  author = {Michael E. Brownfield and Ronald R. Charpentier},
  year = {2003},
  doi = {10.3133/b2207a},
  url = {https://pubs.usgs.gov/publication/b2207A},
  note = {Source identifier: b2207A}
}