@misc{indiciae6154f91b5074,
  title = {Total-count gamma radiation map of the Gbanka Quadrangle, Liberia},
  author = {John C. Behrendt and C.S. Wotorson},
  year = {1974},
  doi = {10.3133/i776c},
  url = {https://pubs.usgs.gov/publication/i776C},
  note = {Source identifier: i776C}
}