@misc{indiciae6ca022e294af,
  title = {Water and copper-mine tailings in karst terrane of Rio Tanama basin, Puerto Rico},
  author = {Donald G. Jordan},
  year = {1970},
  doi = {10.3133/ofr70177},
  url = {https://pubs.usgs.gov/publication/ofr70177},
  note = {Source identifier: ofr70177}
}