@misc{indiciae36543b1854a6,
  title = {Geology of the Bopolu Quadrangle, Liberia},
  author = {Roberts Manning Wallace},
  year = {1974},
  doi = {10.3133/ofr74302},
  url = {https://pubs.usgs.gov/publication/ofr74302},
  note = {Source identifier: ofr74302}
}