@misc{indiciae6ca74af5be8b,
  title = {Preconstruction and postconstruction ground-water levels, Lock and Dam 3, Red River Valley, Louisiana},
  author = {A. H. Ludwig and J. E. Terry},
  year = {1979},
  doi = {10.3133/ofr79920},
  url = {https://pubs.usgs.gov/publication/ofr79920},
  note = {Source identifier: ofr79920}
}