@misc{indiciae8ff294f5539f,
  title = {1:2,000,000-scale Counties of the United States},
  author = {K.J. Lanfear},
  year = {1994},
  doi = {10.3133/70046239},
  url = {https://pubs.usgs.gov/publication/70046239},
  note = {Source identifier: 70046239}
}