@misc{indiciae8dfa2a91cb32,
  title = {Aeromagnetic map of the Voinjama Quadrangle, Liberia},
  author = {John C. Behrendt and C.S. Wotorson},
  year = {1974},
  doi = {10.3133/i771b},
  url = {https://pubs.usgs.gov/publication/i771B},
  note = {Source identifier: i771B}
}