@misc{indiciae3f6a29ef1ecb,
  title = {A quality-assurance assessment for constituents reported by the National Atmospheric Deposition Program and the National Trends Network},
  author = {R.B. See and L.J. Schroder and T. C. Willoughby},
  year = {1989},
  doi = {10.1016/0004-6981(89)90063-2},
  url = {https://pubs.usgs.gov/publication/70015738},
  note = {Source identifier: 70015738}
}