@misc{indiciae70cd1f36ca4f,
  title = {Preparation of a geologic photo map and hydrologic study of the Yemen Arab Republic},
  author = {Maurice J. Grolier and M. Ibrahim and W.C. Overstreet and G. Chase Tibbitts and D.F. Davidson},
  year = {1978},
  doi = {10.3133/ofr78770},
  url = {https://pubs.usgs.gov/publication/ofr78770},
  note = {Source identifier: ofr78770}
}