@misc{indiciaea068be5ea74d,
  title = {Use of diverse geochemical data sets to determine sources and sinks of nitrate and methane in groundwater, Garfield County, Colorado, 2009},
  author = {P.B. McMahon and J.C. Thomas and A.G. Hunt},
  year = {2011},
  doi = {10.3133/sir20105215},
  url = {https://pubs.usgs.gov/publication/sir20105215},
  note = {Source identifier: sir20105215}
}