@misc{indiciae5f0f05f529bc,
  title = {Hydrologic Unit Map-1974, State of Louisiana},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1977},
  doi = {10.3133/hu18},
  url = {https://pubs.usgs.gov/publication/hu18},
  note = {Source identifier: hu18}
}