@misc{indiciae9c09b1001fc5,
  title = {Reconnaissance of ground-water quality throughout Puerto Rico, September-October, 1981},
  author = {Fernando Gómez-Gómez and Senen Guzman-Rios},
  year = {1982},
  doi = {10.3133/ofr82332},
  url = {https://pubs.usgs.gov/publication/ofr82332},
  note = {Source identifier: ofr82332}
}