@misc{indiciae819e86d2abc6,
  title = {Design of the National Trends Network for monitoring the chemistry of atmospheric precipitation},
  author = {J.K. Robertson and J.W. Wilson},
  year = {1985},
  doi = {10.3133/cir964},
  url = {https://pubs.usgs.gov/publication/cir964},
  note = {Source identifier: cir964}
}