@misc{indiciae009214c6ac9a,
  title = {Surface-water, water-quality, and ground-water assessment of the Municipio of Ponce, Puerto Rico, 2002-2004},
  author = {Jesús Rodríguez-Martínez and Luis Santiago-Rivera and Jose M. Rodriguez and Fernando Gómez-Gómez},
  year = {2006},
  doi = {10.3133/sir20055243},
  url = {https://pubs.usgs.gov/publication/sir20055243},
  note = {Source identifier: sir20055243}
}