@misc{indiciaeeae0928b0418,
  title = {Some chemical characteristics of mine drainage in Illinois},
  author = {L.G. Toler},
  year = {1980},
  doi = {10.3133/ofr80416},
  url = {https://pubs.usgs.gov/publication/ofr80416},
  note = {Source identifier: ofr80416}
}