@misc{indiciaef4dc0c3742d1,
  title = {Nitric acid dry deposition to conifer forests: Niwot Ridge spruce-fir-pine study},
  author = {H. Sievering and T. Kelly and G. McConville and C. Seibold and A. Turnipseed},
  year = {2001},
  doi = {10.1016/s1352-2310(01)00156-x},
  url = {https://pubs.usgs.gov/publication/70023330},
  note = {Source identifier: 70023330}
}