@misc{indiciae2c65d3d1041a,
  title = {What do maps show?},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1994},
  doi = {10.3133/70039472},
  url = {https://pubs.usgs.gov/publication/70039472},
  note = {Source identifier: 70039472}
}