@misc{indiciae2b2ef4628a9d,
  title = {Results of spirit leveling in Tennessee, 1910 and 1911},
  author = {Robert Bradford Marshall},
  year = {1912},
  doi = {10.3133/b519},
  url = {https://pubs.usgs.gov/publication/b519},
  note = {Source identifier: b519}
}