@misc{indiciaec0acc06b249e,
  title = {Water and copper-mine tailings in karst terrane of Rio Tanama basin, Puerto Rico},
  author = {D.G. Jordan},
  year = {1971},
  doi = {10.3133/ofr71163},
  url = {https://pubs.usgs.gov/publication/ofr71163},
  note = {Source identifier: ofr71163}
}