@misc{indiciae6723563b09ef,
  title = {The topographic and geologic atlas of the United States},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1909},
  doi = {10.3133/70047702},
  url = {https://pubs.usgs.gov/publication/70047702},
  note = {Source identifier: 70047702}
}