@misc{indiciae9064240585b8,
  title = {Dissolved metals and associated constituents in abandoned coal-mine discharges, Pennsylvania, USA. Part 1: Constituent quantities and correlations},
  author = {C.A. Cravotta},
  year = {2008},
  doi = {10.1016/j.apgeochem.2007.10.011},
  url = {https://pubs.usgs.gov/publication/70033658},
  note = {Source identifier: 70033658}
}