@misc{indiciae8fac2828fe2d,
  title = {Geologic map of the Voinjama Quadrangle, Liberia},
  author = {J. F. Seitz},
  year = {1977},
  doi = {10.3133/i771d},
  url = {https://pubs.usgs.gov/publication/i771D},
  note = {Source identifier: i771D}
}