@misc{indiciaefe00dc43b790,
  title = {Surface water acidification responses and critical loads of sulfur and nitrogen deposition in Loch Vale watershed, Colorado},
  author = {T.J. Sullivan and B.J. Cosby and K.A. Tonnessen and D. W. Clow},
  year = {2005},
  doi = {10.1029/2004wr003414},
  url = {https://pubs.usgs.gov/publication/70029438},
  note = {Source identifier: 70029438}
}