@misc{indiciae5a19f898a8e2,
  title = {Organic carbon and nitrogen concentrations and annual organic carbon load of six selected rivers of the United States},
  author = {Ronald L. Malcolm and W. H. Durum},
  year = {1976},
  doi = {10.3133/wsp1817f},
  url = {https://pubs.usgs.gov/publication/wsp1817F},
  note = {Source identifier: wsp1817F}
}