@misc{indiciae2db168e4e3fd,
  title = {Organic acids in naturally colored surface waters},
  author = {William L. Lamar and D.F. Goerlitz},
  year = {1966},
  doi = {10.3133/wsp1817a},
  url = {https://pubs.usgs.gov/publication/wsp1817A},
  note = {Source identifier: wsp1817A}
}