@misc{indiciae4f2188438916,
  title = {Setting limits: Using air pollution thresholds to protect and restore U.S. ecosystems},
  author = {M.E. Fenn and K.F. Lambert and T.F. Blett and Douglas A. Burns and L.H. Pardo and Gary M. Lovett and R. A. Haeuber and D.C. Evers and C. T. Driscoll and D.S. Jeffries},
  year = {2011},
  url = {https://pubs.usgs.gov/publication/70032292},
  note = {Source identifier: 70032292}
}