@misc{indiciae20413055ded4,
  title = {Changing regional emissions of airborne pollutants reflected in the chemistry of snowpacks and wetfall in the Rocky Mountain region, USA, 1993–2012},
  author = {George P. Ingersoll and Debra C. Miller and Kristi H. Morris and Jill A. McMurray and Garrett M. Port and Brian Caruso},
  year = {2016},
  doi = {10.1007/s11270-016-2784-4},
  url = {https://pubs.usgs.gov/publication/70174947},
  note = {Source identifier: 70174947}
}