@misc{indiciae0e329038e180,
  title = {Hydrogeochemical data of coal strip-mine spoil near Macon in north-central Missouri},
  author = {D. C. Hall},
  year = {1986},
  doi = {10.3133/ofr87119},
  url = {https://pubs.usgs.gov/publication/ofr87119},
  note = {Source identifier: ofr87119}
}