@misc{indiciae9b09e8c2aec9,
  title = {Evidence for acid-precipitation-induced trends in stream chemistry at hydrologic bench-mark stations},
  author = {Richard A. Smith and Richard B. Alexander},
  year = {1983},
  doi = {10.3133/cir910},
  url = {https://pubs.usgs.gov/publication/cir910},
  note = {Source identifier: cir910}
}