@misc{indiciae1843b6976275,
  title = {Estimating iron and aluminum content of acid mine discharge from a north-central Pennsylvania coal field by use of acidity titration curves},
  author = {A.N. Ott},
  year = {1986},
  doi = {10.3133/wri844335},
  url = {https://pubs.usgs.gov/publication/wri844335},
  note = {Source identifier: wri844335}
}