@misc{indiciaed64976c42b67,
  title = {Contributions to the geography of the United States, 1923-1924},
  author = {Marius R. Campbell},
  year = {1925},
  doi = {10.3133/b760},
  url = {https://pubs.usgs.gov/publication/b760},
  note = {Source identifier: b760}
}