@misc{indiciaef423207c7821,
  title = {External quality assurance project report for the National Atmospheric Deposition Program’s National Trends Network and Mercury Deposition Network, 2017–18},
  author = {Gregory A. Wetherbee and RoseAnn Martin},
  year = {2020},
  doi = {10.3133/sir20205084},
  url = {https://pubs.usgs.gov/publication/sir20205084},
  note = {Source identifier: sir20205084}
}