@misc{indiciaeca824bccb4dc,
  title = {Analytical method for dissolved-organic carbon fractionation},
  author = {Jerry A. Leenheer and Edward W. D. Huffman},
  year = {1979},
  doi = {10.3133/wri794},
  url = {https://pubs.usgs.gov/publication/wri794},
  note = {Source identifier: wri794}
}