@misc{indiciae646eedc6bfba,
  title = {Contributions to the geography of the United States, 1926},
  author = {Marius R. Campbell},
  year = {1927},
  doi = {10.3133/b790},
  url = {https://pubs.usgs.gov/publication/b790},
  note = {Source identifier: b790}
}