@misc{indiciaec49eef4e0710,
  title = {Using maps in genealogy},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {2002},
  doi = {10.3133/fs09902},
  url = {https://pubs.usgs.gov/publication/fs09902},
  note = {Source identifier: fs09902}
}