@misc{indiciaeedcc240b4a58,
  title = {Excess nitrogen in the U.S. environment: Trends, risks, and solutions},
  author = {E.A. Davidson and M.B. David and J.N. Galloway and C.L. Goodale and R. Haeuber and J. A. Harrison and R. W. Howarth and D.B. Jaynes and R.R. Lowrance and Nolan B. Thomas and J.L. Peel and R.W. Pinder and E. Porter and C.S. Snyder and A.R. Townsend and M.H. Ward},
  year = {2011},
  url = {https://pubs.usgs.gov/publication/70032270},
  note = {Source identifier: 70032270}
}