@misc{indiciae01194f7500d2,
  title = {Acid base accounting--An improved method of interpreting overburden chemistry to predict the quality of coal-mine drainage},
  author = {Keith Brady and Charles A. Cravotta},
  year = {1992},
  url = {https://pubs.usgs.gov/publication/70189554},
  note = {Source identifier: 70189554}
}