@misc{indiciae345f28b119b4,
  title = {Correlations between stream sulphate and regional SO2 emissions},
  author = {R. A. Smith and R. B. Alexander},
  year = {1986},
  doi = {10.1038/322722a0},
  url = {https://pubs.usgs.gov/publication/70015541},
  note = {Source identifier: 70015541}
}