@misc{indiciaef3874003a309,
  title = {Coprecipitation effects in solutions containing ferrous, ferric, and cupric ions},
  author = {John David Hem and M. W. Skougstad},
  year = {1960},
  doi = {10.3133/wsp1459e},
  url = {https://pubs.usgs.gov/publication/wsp1459E},
  note = {Source identifier: wsp1459E}
}