@misc{indiciaeda58aba5084a,
  title = {Ground-water levels in alluvium on the South coast of Puerto Rico, February 1978},
  author = {Jose R. Diaz},
  year = {1979},
  doi = {10.3133/ofr791272},
  url = {https://pubs.usgs.gov/publication/ofr791272},
  note = {Source identifier: ofr791272}
}