@misc{indiciaeddc318e56c4c,
  title = {Water resources data for Puerto Rico, surface and quality-of-water records, water years 1975-76, ground water records, water years 1973-76},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1978},
  doi = {10.3133/wdrpr761},
  url = {https://pubs.usgs.gov/publication/wdrPR761},
  note = {Source identifier: wdrPR761}
}