@misc{indiciae586a827f938a,
  title = {Ground water in the Lajas Valley, Puerto Rico},
  author = {Henry R. Anderson},
  year = {1977},
  doi = {10.3133/wri7668},
  url = {https://pubs.usgs.gov/publication/wri7668},
  note = {Source identifier: wri7668}
}