@misc{indiciaecd3834aea665,
  title = {Geology of the Zwedru Quadrangle, Liberia},
  author = {Eric R. Force and Helen Marie Beikman},
  year = {1974},
  doi = {10.3133/ofr74307},
  url = {https://pubs.usgs.gov/publication/ofr74307},
  note = {Source identifier: ofr74307}
}