@misc{indiciaec554d21b8daf,
  title = {Feasibility study for an airborne geophysical survey of the Republic of Liberia},
  author = {Randolph Wilson Bromery},
  year = {1968},
  doi = {10.3133/ofr6822},
  url = {https://pubs.usgs.gov/publication/ofr6822},
  note = {Source identifier: ofr6822}
}