@misc{indiciae01a097da160b,
  title = {Maps of the World},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1999},
  doi = {10.3133/70039243},
  url = {https://pubs.usgs.gov/publication/70039243},
  note = {Source identifier: 70039243}
}