@misc{indiciaec738c754dbf1,
  title = {A comparative study of stream water and stream sediment as geochemical exploration media in the Rio Tanama porphyry copper district, Puerto Rico},
  author = {R. E. Learned and T. T. Chao and R. F. Sanzolone},
  year = {1985},
  doi = {10.1016/0375-6742(85)90044-5},
  url = {https://pubs.usgs.gov/publication/70012909},
  note = {Source identifier: 70012909}
}