@misc{indiciae17d58e6ad39b,
  title = {Ground-water resources in Lajas Valley, Puerto Rico},
  author = {R. P. Graves},
  year = {1991},
  doi = {10.3133/wri894182},
  url = {https://pubs.usgs.gov/publication/wri894182},
  note = {Source identifier: wri894182}
}