@misc{indiciaee052913e0187,
  title = {Long-term change along the Colorado River in Grand Canyon National Park (1889-2011)},
  author = {R. H. Webb and J. Belnap and M. L. Scott and J.M. Friedman and T.C. Esque},
  year = {2012},
  url = {https://pubs.usgs.gov/publication/70175257},
  note = {Source identifier: 70175257}
}