@misc{indiciaea0902d5d78f1,
  title = {Geologic map of the Sanokole Quadrangle, Liberia},
  author = {E. R. Force and J.W. Berge},
  year = {1977},
  doi = {10.3133/i774d},
  url = {https://pubs.usgs.gov/publication/i774D},
  note = {Source identifier: i774D}
}