@misc{indiciaee049bb92cbda,
  title = {Blueline base map of the United States (single-page format)},
  author = {U.S. Geological Survey},
  year = {1963},
  doi = {10.3133/70276941},
  url = {https://pubs.usgs.gov/publication/70276941},
  note = {Source identifier: 70276941}
}