@misc{indiciae56ba8e6b2399,
  title = {Nitrogen isotopes indicate vehicle emissions and biomass burning dominate ambient ammonia across Colorado's Front Range urban corridor},
  author = {J. David Felix and Alexander Berner and Gregory A. Wetherbee and Sheila F. Murphy and Ruth C. Heindel},
  year = {2023},
  doi = {10.1016/j.envpol.2022.120537},
  url = {https://pubs.usgs.gov/publication/70238423},
  note = {Source identifier: 70238423}
}