@misc{indiciae02432721b3cc,
  title = {Water resources of the Humacao-Naguabo area, eastern Puerto Rico},
  author = {R. P. Graves},
  year = {1989},
  doi = {10.3133/wri874088},
  url = {https://pubs.usgs.gov/publication/wri874088},
  note = {Source identifier: wri874088}
}