@misc{indiciae5e8bfd3c9890,
  title = {Geologic map of the Gbanka Quadrangle, Liberia},
  author = {E. R. Force and J.D.N. Dunbar},
  year = {1974},
  doi = {10.3133/ofr74306},
  url = {https://pubs.usgs.gov/publication/ofr74306},
  note = {Source identifier: ofr74306}
}