@misc{indiciae80455e9bcb27,
  title = {Nitrogen saturation in the Rocky Mountains: Linking emissions, deposition, and ecosystem effects using stable isotopes of nitrogen compounds},
  author = {K. Campbell and L. Nanus and J.K. Böhlke and K. Harlin and J. Collett},
  year = {2007},
  url = {https://pubs.usgs.gov/publication/70031627},
  note = {Source identifier: 70031627}
}