@misc{indiciaec65745a63884,
  title = {Geographic map of the Yemen Arab Republic (San-'a')},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1978},
  doi = {10.3133/i1143a},
  url = {https://pubs.usgs.gov/publication/i1143A},
  note = {Source identifier: i1143A}
}