@misc{indiciae3c93fae218e2,
  title = {Water resources data: Puerto Rico},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1983},
  doi = {10.3133/913},
  url = {https://pubs.usgs.gov/publication/913},
  note = {Source identifier: 913}
}