@misc{indiciaef4528490a795,
  title = {Geographic centers of the United States},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1964},
  doi = {10.3133/70039437},
  url = {https://pubs.usgs.gov/publication/70039437},
  note = {Source identifier: 70039437}
}