@misc{indiciae16408761c37b,
  title = {Aeromagnetic map of the Monrovia Quadrangle, Liberia},
  author = {John C. Behrendt and C.S. Wotorson},
  year = {1974},
  doi = {10.3133/i775b},
  url = {https://pubs.usgs.gov/publication/i775B},
  note = {Source identifier: i775B}
}