@misc{indiciaeb8943093904f,
  title = {Data-driven modeling of background and mine-related acidity and metals in river basins},
  author = {Michael J Friedel},
  year = {2013},
  doi = {10.1016/j.envpol.2013.09.036},
  url = {https://pubs.usgs.gov/publication/70047753},
  note = {Source identifier: 70047753}
}