@misc{indiciaec7b32bba09b3,
  title = {Ground-water levels in alluvium on the south coast of Puerto Rico, February 1979},
  author = {Eloy Colon-Dieppa and J.R. Gonzalez},
  year = {1981},
  doi = {10.3133/ofr81641},
  url = {https://pubs.usgs.gov/publication/ofr81641},
  note = {Source identifier: ofr81641}
}