@misc{indiciae3e9fc4118ede,
  title = {Aeromagnetic map of the Gbanka quadrangle, Liberia},
  author = {John C. Behrendt and Cletus S. Wotorson},
  year = {1974},
  doi = {10.3133/ofr7122},
  url = {https://pubs.usgs.gov/publication/ofr7122},
  note = {Source identifier: ofr7122}
}