@misc{indiciae22f94bb3b0b8,
  title = {Ground-water levels on the south coast of Puerto Rico, February 1974 to February 1975},
  author = {Jose R. Diaz},
  year = {1976},
  doi = {10.3133/ofr76625},
  url = {https://pubs.usgs.gov/publication/ofr76625},
  note = {Source identifier: ofr76625}
}