@misc{indiciae235c78638da8,
  title = {Research and monitoring of precipitation chemistry in the United States: Present status and future needs},
  author = {U.S. Geological Survey},
  year = {1978},
  doi = {10.3133/70265514},
  url = {https://pubs.usgs.gov/publication/70265514},
  note = {Source identifier: 70265514}
}