@misc{indiciaed81817bf2fda,
  title = {Potentiometric surface of the upper limestone aquifer in the Dorado-Vega Alta area, North-central Puerto Rico, February 1983},
  author = {Heriberto Torres-Sierra},
  year = {1985},
  doi = {10.3133/wri854268},
  url = {https://pubs.usgs.gov/publication/wri854268},
  note = {Source identifier: wri854268}
}