@misc{indiciaed9f19911d7c2,
  title = {Tannins and terpenoids as major precursors of Suwannee River fulvic acid},
  author = {Jerry A. Leenheer and Colleen E. Rostad},
  year = {2004},
  doi = {10.3133/sir20045276},
  url = {https://pubs.usgs.gov/publication/sir20045276},
  note = {Source identifier: sir20045276}
}