@misc{indiciae6d669ab6e6a2,
  title = {External quality-assurance programs managed by the U.S. Geological Survey in support of the National Atmospheric Deposition Program/National Trends Network},
  author = {Natalie E. Latysh and Gregory A. Wetherbee},
  year = {2005},
  doi = {10.3133/ofr20051024},
  url = {https://pubs.usgs.gov/publication/ofr20051024},
  note = {Source identifier: ofr20051024}
}