@misc{indiciaebe045c1bc160,
  title = {Some effects of acid mine drainage on Clear Creek, Colorado},
  author = {W. H. Ficklin and K. S. Smith and Katherine Walton-Day},
  year = {1987},
  url = {https://pubs.usgs.gov/publication/70199827},
  note = {Source identifier: 70199827}
}