@misc{indiciaecf20eea3ebfc,
  title = {Memorandum on the ground-water resources of Pharr Mounds Historic Site, Natchez Trace Parkway, Mississippi},
  author = {F.H. Thomson},
  year = {1969},
  doi = {10.3133/ofr69281},
  url = {https://pubs.usgs.gov/publication/ofr69281},
  note = {Source identifier: ofr69281}
}