@misc{indiciae15d2b2ccccd0,
  title = {Geology and petroleum resources of north-central and northeastern Africa},
  author = {J.A. Peterson},
  year = {1985},
  doi = {10.3133/ofr85709},
  url = {https://pubs.usgs.gov/publication/ofr85709},
  note = {Source identifier: ofr85709}
}