@misc{indiciae1cf4cfe268f4,
  title = {Water quality and chemical evolution of ground water within the north coast limestone aquifers of Puerto Rico},
  author = {Angel J. Roman-Mas and Roger W. Lee},
  year = {1985},
  url = {https://pubs.usgs.gov/publication/70171506},
  note = {Source identifier: 70171506}
}