@misc{indiciae9b1689d040ec,
  title = {Assessment of spring chemistry along the south rim of Grand Canyon in Grand Canyon National Park, Arizona: A U.S. Geological Survey and National Park Service partnership},
  author = {Robert J. Hart and John Rihs and Howard E. Taylor and Stephen A. Monroe},
  year = {2002},
  doi = {10.3133/fs09602},
  url = {https://pubs.usgs.gov/publication/fs09602},
  note = {Source identifier: fs09602}
}