@misc{indiciae42b0df26efd0,
  title = {Ground-water use of the principal aquifers in Puerto Rico during calendar year 1990},
  author = {Wanda L. Molina-Rivera},
  year = {1997},
  doi = {10.3133/fs18896},
  url = {https://pubs.usgs.gov/publication/fs18896},
  note = {Source identifier: fs18896}
}